diff --git a/go.mod b/go.mod
index 2c5d926..186f5f0 100644
--- a/go.mod
+++ b/go.mod
@@ -5,5 +5,6 @@ go 1.13
 require (
 	github.com/google/go-querystring v1.1.0
 	github.com/joho/godotenv v1.3.0
+	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 	gopkg.in/h2non/gock.v1 v1.0.16
 )
diff --git a/v5/error_test.go b/v5/error_test.go
index 7d027cb..1c0535f 100644
--- a/v5/error_test.go
+++ b/v5/error_test.go
@@ -1,8 +1,9 @@
 package v5
 
 import (
-	"errors"
 	"testing"
+
+	"golang.org/x/xerrors"
 )
 
 func TestFailure_ApiErrorsSlice(t *testing.T) {
@@ -14,7 +15,7 @@ func TestFailure_ApiErrorsSlice(t *testing.T) {
 	var expEr *APIError
 	e := NewAPIError(b)
 
-	if errors.As(e, &expEr) {
+	if xerrors.As(e, &expEr) {
 		if eq := expEr.Errors["0"] == expected["0"]; eq != true {
 			t.Errorf("%+v", eq)
 		}
@@ -32,7 +33,7 @@ func TestFailure_ApiErrorsMap(t *testing.T) {
 	var expEr *APIError
 	e := NewAPIError(b)
 
-	if errors.As(e, &expEr) {
+	if xerrors.As(e, &expEr) {
 		if eq := expected["id"] == expEr.Errors["id"]; eq != true {
 			t.Errorf("%+v", eq)
 		}
diff --git a/v5/response.go b/v5/response.go
index 13bd09f..3920682 100644
--- a/v5/response.go
+++ b/v5/response.go
@@ -20,54 +20,54 @@ type OrderCreateResponse struct {
 // OperationResponse type.
 type OperationResponse struct {
 	Success bool              `json:"success"`
-	Errors  map[string]string `json:"errors,omitempty,brackets"`
+	Errors  map[string]string `json:"errors,omitempty"`
 }
 
 // VersionResponse return available API versions.
 type VersionResponse struct {
 	Success  bool     `json:"success,omitempty"`
-	Versions []string `json:"versions,brackets,omitempty"`
+	Versions []string `json:"versions,omitempty"`
 }
 
 // CredentialResponse return available API methods.
 type CredentialResponse struct {
 	Success        bool     `json:"success,omitempty"`
-	Credentials    []string `json:"credentials,brackets,omitempty"`
+	Credentials    []string `json:"credentials,omitempty"`
 	SiteAccess     string   `json:"siteAccess,omitempty"`
-	SitesAvailable []string `json:"sitesAvailable,brackets,omitempty"`
+	SitesAvailable []string `json:"sitesAvailable,omitempty"`
 }
 
 // CustomerResponse type.
 type CustomerResponse struct {
 	Success  bool      `json:"success"`
-	Customer *Customer `json:"customer,omitempty,brackets"`
+	Customer *Customer `json:"customer,omitempty"`
 }
 
 // CorporateCustomerResponse type.
 type CorporateCustomerResponse struct {
 	Success           bool               `json:"success"`
-	CorporateCustomer *CorporateCustomer `json:"customerCorporate,omitempty,brackets"`
+	CorporateCustomer *CorporateCustomer `json:"customerCorporate,omitempty"`
 }
 
 // CustomersResponse type.
 type CustomersResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Customers  []Customer  `json:"customers,omitempty,brackets"`
+	Customers  []Customer  `json:"customers,omitempty"`
 }
 
 // CorporateCustomersResponse type.
 type CorporateCustomersResponse struct {
 	Success            bool                `json:"success"`
 	Pagination         *Pagination         `json:"pagination,omitempty"`
-	CustomersCorporate []CorporateCustomer `json:"customersCorporate,omitempty,brackets"`
+	CustomersCorporate []CorporateCustomer `json:"customersCorporate,omitempty"`
 }
 
 // CorporateCustomersNotesResponse type.
 type CorporateCustomersNotesResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Notes      []Note      `json:"notes,omitempty,brackets"`
+	Notes      []Note      `json:"notes,omitempty"`
 }
 
 // CorporateCustomersAddressesResponse type.
@@ -101,7 +101,7 @@ type CorporateCustomerChangeResponse CustomerChangeResponse
 // CustomersUploadResponse type.
 type CustomersUploadResponse struct {
 	Success           bool              `json:"success"`
-	UploadedCustomers []IdentifiersPair `json:"uploadedCustomers,omitempty,brackets"`
+	UploadedCustomers []IdentifiersPair `json:"uploadedCustomers,omitempty"`
 }
 
 // CorporateCustomersUploadResponse type.
@@ -111,7 +111,7 @@ type CorporateCustomersUploadResponse CustomersUploadResponse
 type CustomersHistoryResponse struct {
 	Success     bool                    `json:"success,omitempty"`
 	GeneratedAt string                  `json:"generatedAt,omitempty"`
-	History     []CustomerHistoryRecord `json:"history,omitempty,brackets"`
+	History     []CustomerHistoryRecord `json:"history,omitempty"`
 	Pagination  *Pagination             `json:"pagination,omitempty"`
 }
 
@@ -119,21 +119,21 @@ type CustomersHistoryResponse struct {
 type CorporateCustomersHistoryResponse struct {
 	Success     bool                             `json:"success,omitempty"`
 	GeneratedAt string                           `json:"generatedAt,omitempty"`
-	History     []CorporateCustomerHistoryRecord `json:"history,omitempty,brackets"`
+	History     []CorporateCustomerHistoryRecord `json:"history,omitempty"`
 	Pagination  *Pagination                      `json:"pagination,omitempty"`
 }
 
 // OrderResponse type.
 type OrderResponse struct {
 	Success bool   `json:"success"`
-	Order   *Order `json:"order,omitempty,brackets"`
+	Order   *Order `json:"order,omitempty"`
 }
 
 // OrdersResponse type.
 type OrdersResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Orders     []Order     `json:"orders,omitempty,brackets"`
+	Orders     []Order     `json:"orders,omitempty"`
 }
 
 // OrdersStatusesResponse type.
@@ -145,191 +145,191 @@ type OrdersStatusesResponse struct {
 // OrdersUploadResponse type.
 type OrdersUploadResponse struct {
 	Success        bool              `json:"success"`
-	UploadedOrders []IdentifiersPair `json:"uploadedOrders,omitempty,brackets"`
+	UploadedOrders []IdentifiersPair `json:"uploadedOrders,omitempty"`
 }
 
 // OrdersHistoryResponse type.
 type OrdersHistoryResponse struct {
 	Success     bool                  `json:"success,omitempty"`
 	GeneratedAt string                `json:"generatedAt,omitempty"`
-	History     []OrdersHistoryRecord `json:"history,omitempty,brackets"`
+	History     []OrdersHistoryRecord `json:"history,omitempty"`
 	Pagination  *Pagination           `json:"pagination,omitempty"`
 }
 
 // PackResponse type.
 type PackResponse struct {
 	Success bool  `json:"success"`
-	Pack    *Pack `json:"pack,omitempty,brackets"`
+	Pack    *Pack `json:"pack,omitempty"`
 }
 
 // PacksResponse type.
 type PacksResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Packs      []Pack      `json:"packs,omitempty,brackets"`
+	Packs      []Pack      `json:"packs,omitempty"`
 }
 
 // PacksHistoryResponse type.
 type PacksHistoryResponse struct {
 	Success     bool                 `json:"success,omitempty"`
 	GeneratedAt string               `json:"generatedAt,omitempty"`
-	History     []PacksHistoryRecord `json:"history,omitempty,brackets"`
+	History     []PacksHistoryRecord `json:"history,omitempty"`
 	Pagination  *Pagination          `json:"pagination,omitempty"`
 }
 
 // UserResponse type.
 type UserResponse struct {
 	Success bool  `json:"success"`
-	User    *User `json:"user,omitempty,brackets"`
+	User    *User `json:"user,omitempty"`
 }
 
 // UsersResponse type.
 type UsersResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Users      []User      `json:"users,omitempty,brackets"`
+	Users      []User      `json:"users,omitempty"`
 }
 
 // UserGroupsResponse type.
 type UserGroupsResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Groups     []UserGroup `json:"groups,omitempty,brackets"`
+	Groups     []UserGroup `json:"groups,omitempty"`
 }
 
 // TaskResponse type.
 type TaskResponse struct {
 	Success bool  `json:"success"`
-	Task    *Task `json:"task,omitempty,brackets"`
+	Task    *Task `json:"task,omitempty"`
 }
 
 // TasksResponse type.
 type TasksResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Tasks      []Task      `json:"tasks,omitempty,brackets"`
+	Tasks      []Task      `json:"tasks,omitempty"`
 }
 
 // NotesResponse type.
 type NotesResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Notes      []Note      `json:"notes,omitempty,brackets"`
+	Notes      []Note      `json:"notes,omitempty"`
 }
 
 // SegmentsResponse type.
 type SegmentsResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Segments   []Segment   `json:"segments,omitempty,brackets"`
+	Segments   []Segment   `json:"segments,omitempty"`
 }
 
 // SettingsResponse type.
 type SettingsResponse struct {
 	Success  bool     `json:"success"`
-	Settings Settings `json:"settings,omitempty,brackets"`
+	Settings Settings `json:"settings,omitempty"`
 }
 
 // CountriesResponse type.
 type CountriesResponse struct {
 	Success      bool     `json:"success"`
-	CountriesIso []string `json:"countriesIso,omitempty,brackets"`
+	CountriesIso []string `json:"countriesIso,omitempty"`
 }
 
 // CostGroupsResponse type.
 type CostGroupsResponse struct {
 	Success    bool        `json:"success"`
-	CostGroups []CostGroup `json:"costGroups,omitempty,brackets"`
+	CostGroups []CostGroup `json:"costGroups,omitempty"`
 }
 
 // CostItemsResponse type.
 type CostItemsResponse struct {
 	Success   bool       `json:"success"`
-	CostItems []CostItem `json:"costItems,omitempty,brackets"`
+	CostItems []CostItem `json:"costItems,omitempty"`
 }
 
 // CouriersResponse type.
 type CouriersResponse struct {
 	Success  bool      `json:"success"`
-	Couriers []Courier `json:"couriers,omitempty,brackets"`
+	Couriers []Courier `json:"couriers,omitempty"`
 }
 
 // DeliveryServiceResponse type.
 type DeliveryServiceResponse struct {
 	Success          bool                       `json:"success"`
-	DeliveryServices map[string]DeliveryService `json:"deliveryServices,omitempty,brackets"`
+	DeliveryServices map[string]DeliveryService `json:"deliveryServices,omitempty"`
 }
 
 // DeliveryTypesResponse type.
 type DeliveryTypesResponse struct {
 	Success       bool                    `json:"success"`
-	DeliveryTypes map[string]DeliveryType `json:"deliveryTypes,omitempty,brackets"`
+	DeliveryTypes map[string]DeliveryType `json:"deliveryTypes,omitempty"`
 }
 
 // LegalEntitiesResponse type.
 type LegalEntitiesResponse struct {
 	Success       bool          `json:"success"`
-	LegalEntities []LegalEntity `json:"legalEntities,omitempty,brackets"`
+	LegalEntities []LegalEntity `json:"legalEntities,omitempty"`
 }
 
 // OrderMethodsResponse type.
 type OrderMethodsResponse struct {
 	Success      bool                   `json:"success"`
-	OrderMethods map[string]OrderMethod `json:"orderMethods,omitempty,brackets"`
+	OrderMethods map[string]OrderMethod `json:"orderMethods,omitempty"`
 }
 
 // OrderTypesResponse type.
 type OrderTypesResponse struct {
 	Success    bool                 `json:"success"`
-	OrderTypes map[string]OrderType `json:"orderTypes,omitempty,brackets"`
+	OrderTypes map[string]OrderType `json:"orderTypes,omitempty"`
 }
 
 // PaymentStatusesResponse type.
 type PaymentStatusesResponse struct {
 	Success         bool                     `json:"success"`
-	PaymentStatuses map[string]PaymentStatus `json:"paymentStatuses,omitempty,brackets"`
+	PaymentStatuses map[string]PaymentStatus `json:"paymentStatuses,omitempty"`
 }
 
 // PaymentTypesResponse type.
 type PaymentTypesResponse struct {
 	Success      bool                   `json:"success"`
-	PaymentTypes map[string]PaymentType `json:"paymentTypes,omitempty,brackets"`
+	PaymentTypes map[string]PaymentType `json:"paymentTypes,omitempty"`
 }
 
 // PriceTypesResponse type.
 type PriceTypesResponse struct {
 	Success    bool        `json:"success"`
-	PriceTypes []PriceType `json:"priceTypes,omitempty,brackets"`
+	PriceTypes []PriceType `json:"priceTypes,omitempty"`
 }
 
 // ProductStatusesResponse type.
 type ProductStatusesResponse struct {
 	Success         bool                     `json:"success"`
-	ProductStatuses map[string]ProductStatus `json:"productStatuses,omitempty,brackets"`
+	ProductStatuses map[string]ProductStatus `json:"productStatuses,omitempty"`
 }
 
 // StatusesResponse type.
 type StatusesResponse struct {
 	Success  bool              `json:"success"`
-	Statuses map[string]Status `json:"statuses,omitempty,brackets"`
+	Statuses map[string]Status `json:"statuses,omitempty"`
 }
 
 // StatusGroupsResponse type.
 type StatusGroupsResponse struct {
 	Success      bool                   `json:"success"`
-	StatusGroups map[string]StatusGroup `json:"statusGroups,omitempty,brackets"`
+	StatusGroups map[string]StatusGroup `json:"statusGroups,omitempty"`
 }
 
 // SitesResponse type.
 type SitesResponse struct {
 	Success bool            `json:"success"`
-	Sites   map[string]Site `json:"sites,omitempty,brackets"`
+	Sites   map[string]Site `json:"sites,omitempty"`
 }
 
 // StoresResponse type.
 type StoresResponse struct {
 	Success bool    `json:"success"`
-	Stores  []Store `json:"stores,omitempty,brackets"`
+	Stores  []Store `json:"stores,omitempty"`
 }
 
 // InventoriesResponse type.
@@ -350,34 +350,34 @@ type StoreUploadResponse struct {
 type ProductsGroupsResponse struct {
 	Success      bool           `json:"success"`
 	Pagination   *Pagination    `json:"pagination,omitempty"`
-	ProductGroup []ProductGroup `json:"productGroup,omitempty,brackets"`
+	ProductGroup []ProductGroup `json:"productGroup,omitempty"`
 }
 
 // ProductsResponse type.
 type ProductsResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Products   []Product   `json:"products,omitempty,brackets"`
+	Products   []Product   `json:"products,omitempty"`
 }
 
 // ProductsPropertiesResponse type.
 type ProductsPropertiesResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Properties []Property  `json:"properties,omitempty,brackets"`
+	Properties []Property  `json:"properties,omitempty"`
 }
 
 // DeliveryShipmentsResponse type.
 type DeliveryShipmentsResponse struct {
 	Success           bool               `json:"success"`
 	Pagination        *Pagination        `json:"pagination,omitempty"`
-	DeliveryShipments []DeliveryShipment `json:"deliveryShipments,omitempty,brackets"`
+	DeliveryShipments []DeliveryShipment `json:"deliveryShipments,omitempty"`
 }
 
 // DeliveryShipmentResponse type.
 type DeliveryShipmentResponse struct {
 	Success          bool              `json:"success"`
-	DeliveryShipment *DeliveryShipment `json:"deliveryShipment,omitempty,brackets"`
+	DeliveryShipment *DeliveryShipment `json:"deliveryShipment,omitempty"`
 }
 
 // DeliveryShipmentUpdateResponse type.
@@ -396,13 +396,13 @@ type IntegrationModuleResponse struct {
 // IntegrationModuleEditResponse type.
 type IntegrationModuleEditResponse struct {
 	Success bool         `json:"success"`
-	Info    ResponseInfo `json:"info,omitempty,brackets"`
+	Info    ResponseInfo `json:"info,omitempty"`
 }
 
 // ResponseInfo type.
 type ResponseInfo struct {
-	MgTransportInfo MgInfo `json:"mgTransport,omitempty,brackets"`
-	MgBotInfo       MgInfo `json:"mgBot,omitempty,brackets"`
+	MgTransportInfo MgInfo `json:"mgTransport,omitempty"`
+	MgBotInfo       MgInfo `json:"mgBot,omitempty"`
 }
 
 // MgInfo type.
@@ -415,26 +415,26 @@ type MgInfo struct {
 type CostsResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Costs      []Cost      `json:"costs,omitempty,brackets"`
+	Costs      []Cost      `json:"costs,omitempty"`
 }
 
 // CostsUploadResponse type.
 type CostsUploadResponse struct {
 	Success       bool  `json:"success"`
-	UploadedCosts []int `json:"uploadedCosts,omitempty,brackets"`
+	UploadedCosts []int `json:"uploadedCosts,omitempty"`
 }
 
 // CostsDeleteResponse type.
 type CostsDeleteResponse struct {
 	Success       bool  `json:"success"`
-	Count         int   `json:"count,omitempty,brackets"`
-	NotRemovedIds []int `json:"notRemovedIds,omitempty,brackets"`
+	Count         int   `json:"count,omitempty"`
+	NotRemovedIds []int `json:"notRemovedIds,omitempty"`
 }
 
 // CostResponse type.
 type CostResponse struct {
 	Success bool  `json:"success"`
-	Cost    *Cost `json:"cost,omitempty,brackets"`
+	Cost    *Cost `json:"cost,omitempty"`
 }
 
 // FilesResponse type.
@@ -460,14 +460,14 @@ type FileResponse struct {
 type CustomFieldsResponse struct {
 	Success      bool           `json:"success"`
 	Pagination   *Pagination    `json:"pagination,omitempty"`
-	CustomFields []CustomFields `json:"customFields,omitempty,brackets"`
+	CustomFields []CustomFields `json:"customFields,omitempty"`
 }
 
 // CustomDictionariesResponse type.
 type CustomDictionariesResponse struct {
 	Success            bool                `json:"success"`
 	Pagination         *Pagination         `json:"pagination,omitempty"`
-	CustomDictionaries *[]CustomDictionary `json:"customDictionaries,omitempty,brackets"`
+	CustomDictionaries *[]CustomDictionary `json:"customDictionaries,omitempty"`
 }
 
 // CustomResponse type.
@@ -479,17 +479,17 @@ type CustomResponse struct {
 // CustomDictionaryResponse type.
 type CustomDictionaryResponse struct {
 	Success          bool              `json:"success"`
-	CustomDictionary *CustomDictionary `json:"CustomDictionary,omitempty,brackets"`
+	CustomDictionary *CustomDictionary `json:"CustomDictionary,omitempty"`
 }
 
 // CustomFieldResponse type.
 type CustomFieldResponse struct {
 	Success     bool         `json:"success"`
-	CustomField CustomFields `json:"customField,omitempty,brackets"`
+	CustomField CustomFields `json:"customField,omitempty"`
 }
 
 // UnitsResponse type.
 type UnitsResponse struct {
 	Success bool    `json:"success"`
-	Units   *[]Unit `json:"units,omitempty,brackets"`
+	Units   *[]Unit `json:"units,omitempty"`
 }
diff --git a/v5/types.go b/v5/types.go
index 348fcdd..c6c4c1a 100644
--- a/v5/types.go
+++ b/v5/types.go
@@ -98,7 +98,7 @@ type Property struct {
 	Code  string   `json:"code,omitempty"`
 	Name  string   `json:"name,omitempty"`
 	Value string   `json:"value,omitempty"`
-	Sites []string `json:"Sites,omitempty,brackets"`
+	Sites []string `json:"Sites,omitempty"`
 }
 
 // IdentifiersPair type.
@@ -127,7 +127,7 @@ type Customer struct {
 	Patronymic                   string            `json:"patronymic,omitempty"`
 	Sex                          string            `json:"sex,omitempty"`
 	Email                        string            `json:"email,omitempty"`
-	Phones                       []Phone           `json:"phones,brackets,omitempty"`
+	Phones                       []Phone           `json:"phones,omitempty"`
 	Address                      *Address          `json:"address,omitempty"`
 	CreatedAt                    string            `json:"createdAt,omitempty"`
 	Birthday                     string            `json:"birthday,omitempty"`
@@ -153,8 +153,8 @@ type Customer struct {
 	BrowserID                    string            `json:"browserId,omitempty"`
 	MgCustomerID                 string            `json:"mgCustomerId,omitempty"`
 	PhotoURL                     string            `json:"photoUrl,omitempty"`
-	CustomFields                 map[string]string `json:"customFields,omitempty,brackets"`
-	Tags                         []Tag             `json:"tags,brackets,omitempty"`
+	CustomFields                 map[string]string `json:"customFields,omitempty"`
+	Tags                         []Tag             `json:"tags,omitempty"`
 }
 
 // CorporateCustomer type.
@@ -165,7 +165,7 @@ type CorporateCustomer struct {
 	CreatedAt          string                     `json:"createdAt,omitempty"`
 	Vip                bool                       `json:"vip,omitempty"`
 	Bad                bool                       `json:"bad,omitempty"`
-	CustomFields       map[string]string          `json:"customFields,omitempty,brackets"`
+	CustomFields       map[string]string          `json:"customFields,omitempty"`
 	PersonalDiscount   float32                    `json:"personalDiscount,omitempty"`
 	DiscountCardNumber string                     `json:"discountCardNumber,omitempty"`
 	ManagerID          int                        `json:"managerId,omitempty"`
@@ -226,7 +226,7 @@ type Company struct {
 	CreatedAt    string            `json:"createdAt,omitempty"`
 	Contragent   *Contragent       `json:"contragent,omitempty"`
 	Address      *IdentifiersPair  `json:"address,omitempty"`
-	CustomFields map[string]string `json:"customFields,omitempty,brackets"`
+	CustomFields map[string]string `json:"customFields,omitempty"`
 }
 
 // CorporateCustomerNote type.
@@ -249,9 +249,9 @@ type CustomerHistoryRecord struct {
 	Deleted   bool      `json:"deleted,omitempty"`
 	Source    string    `json:"source,omitempty"`
 	Field     string    `json:"field,omitempty"`
-	User      *User     `json:"user,omitempty,brackets"`
-	APIKey    *APIKey   `json:"apiKey,omitempty,brackets"`
-	Customer  *Customer `json:"customer,omitempty,brackets"`
+	User      *User     `json:"user,omitempty"`
+	APIKey    *APIKey   `json:"apiKey,omitempty"`
+	Customer  *Customer `json:"customer,omitempty"`
 }
 
 // CorporateCustomerHistoryRecord type.
@@ -262,9 +262,9 @@ type CorporateCustomerHistoryRecord struct {
 	Deleted           bool               `json:"deleted,omitempty"`
 	Source            string             `json:"source,omitempty"`
 	Field             string             `json:"field,omitempty"`
-	User              *User              `json:"user,omitempty,brackets"`
-	APIKey            *APIKey            `json:"apiKey,omitempty,brackets"`
-	CorporateCustomer *CorporateCustomer `json:"corporateCustomer,omitempty,brackets"`
+	User              *User              `json:"user,omitempty"`
+	APIKey            *APIKey            `json:"apiKey,omitempty"`
+	CorporateCustomer *CorporateCustomer `json:"corporateCustomer,omitempty"`
 }
 
 /**
@@ -319,9 +319,9 @@ type Order struct {
 	Customer                      *Customer               `json:"customer,omitempty"`
 	Delivery                      *OrderDelivery          `json:"delivery,omitempty"`
 	Marketplace                   *OrderMarketplace       `json:"marketplace,omitempty"`
-	Items                         []OrderItem             `json:"items,omitempty,brackets"`
-	CustomFields                  map[string]string       `json:"customFields,omitempty,brackets"`
-	Payments                      map[string]OrderPayment `json:"payments,omitempty,brackets"`
+	Items                         []OrderItem             `json:"items,omitempty"`
+	CustomFields                  map[string]string       `json:"customFields,omitempty"`
+	Payments                      map[string]OrderPayment `json:"payments,omitempty"`
 }
 
 // OrdersStatus type.
@@ -442,7 +442,7 @@ type OrderItem struct {
 	Comment               string              `json:"comment,omitempty"`
 	IsCanceled            bool                `json:"isCanceled,omitempty"`
 	Offer                 Offer               `json:"offer,omitempty"`
-	Properties            map[string]Property `json:"properties,omitempty,brackets"`
+	Properties            map[string]Property `json:"properties,omitempty"`
 	PriceType             *PriceType          `json:"priceType,omitempty"`
 }
 
@@ -454,9 +454,9 @@ type OrdersHistoryRecord struct {
 	Deleted   bool    `json:"deleted,omitempty"`
 	Source    string  `json:"source,omitempty"`
 	Field     string  `json:"field,omitempty"`
-	User      *User   `json:"user,omitempty,brackets"`
-	APIKey    *APIKey `json:"apiKey,omitempty,brackets"`
-	Order     *Order  `json:"order,omitempty,brackets"`
+	User      *User   `json:"user,omitempty"`
+	APIKey    *APIKey `json:"apiKey,omitempty"`
+	Order     *Order  `json:"order,omitempty"`
 }
 
 // Pack type.
@@ -488,8 +488,8 @@ type PacksHistoryRecord struct {
 	Deleted   bool   `json:"deleted,omitempty"`
 	Source    string `json:"source,omitempty"`
 	Field     string `json:"field,omitempty"`
-	User      *User  `json:"user,omitempty,brackets"`
-	Pack      *Pack  `json:"pack,omitempty,brackets"`
+	User      *User  `json:"user,omitempty"`
+	Pack      *Pack  `json:"pack,omitempty"`
 }
 
 // Offer type.
@@ -507,11 +507,11 @@ type Offer struct {
 	Width         float32           `json:"width,omitempty"`
 	Length        float32           `json:"length,omitempty"`
 	Weight        float32           `json:"weight,omitempty"`
-	Stores        []Inventory       `json:"stores,omitempty,brackets"`
-	Properties    map[string]string `json:"properties,omitempty,brackets"`
-	Prices        []OfferPrice      `json:"prices,omitempty,brackets"`
-	Images        []string          `json:"images,omitempty,brackets"`
-	Unit          *Unit             `json:"unit,omitempty,brackets"`
+	Stores        []Inventory       `json:"stores,omitempty"`
+	Properties    map[string]string `json:"properties,omitempty"`
+	Prices        []OfferPrice      `json:"prices,omitempty"`
+	Images        []string          `json:"images,omitempty"`
+	Unit          *Unit             `json:"unit,omitempty"`
 }
 
 // Inventory type.
@@ -585,7 +585,7 @@ type User struct {
 	Email      string      `json:"email,omitempty"`
 	Phone      string      `json:"phone,omitempty"`
 	Status     string      `json:"status,omitempty"`
-	Groups     []UserGroup `json:"groups,omitempty,brackets"`
+	Groups     []UserGroup `json:"groups,omitempty"`
 	MgUserId   uint64      `json:"mgUserId,omitempty"`
 }
 
@@ -596,12 +596,12 @@ type UserGroup struct {
 	SignatureTemplate     string   `json:"signatureTemplate,omitempty"`
 	IsManager             bool     `json:"isManager,omitempty"`
 	IsDeliveryMen         bool     `json:"isDeliveryMen,omitempty"`
-	DeliveryTypes         []string `json:"deliveryTypes,omitempty,brackets"`
-	BreakdownOrderTypes   []string `json:"breakdownOrderTypes,omitempty,brackets"`
-	BreakdownSites        []string `json:"breakdownSites,omitempty,brackets"`
-	BreakdownOrderMethods []string `json:"breakdownOrderMethods,omitempty,brackets"`
-	GrantedOrderTypes     []string `json:"grantedOrderTypes,omitempty,brackets"`
-	GrantedSites          []string `json:"grantedSites,omitempty,brackets"`
+	DeliveryTypes         []string `json:"deliveryTypes,omitempty"`
+	BreakdownOrderTypes   []string `json:"breakdownOrderTypes,omitempty"`
+	BreakdownSites        []string `json:"breakdownSites,omitempty"`
+	BreakdownOrderMethods []string `json:"breakdownOrderMethods,omitempty"`
+	GrantedOrderTypes     []string `json:"grantedOrderTypes,omitempty"`
+	GrantedSites          []string `json:"grantedSites,omitempty"`
 }
 
 /**
@@ -796,7 +796,7 @@ type PaymentStatus struct {
 	PaymentComplete bool     `json:"paymentComplete,omitempty"`
 	Description     string   `json:"description,omitempty"`
 	Ordering        int      `json:"ordering,omitempty"`
-	PaymentTypes    []string `json:"paymentTypes,omitempty,brackets"`
+	PaymentTypes    []string `json:"paymentTypes,omitempty"`
 }
 
 // PaymentType type.
@@ -807,8 +807,8 @@ type PaymentType struct {
 	DefaultForCRM   bool     `json:"defaultForCrm,omitempty"`
 	DefaultForAPI   bool     `json:"defaultForApi,omitempty"`
 	Description     string   `json:"description,omitempty"`
-	DeliveryTypes   []string `json:"deliveryTypes,omitempty,brackets"`
-	PaymentStatuses []string `json:"PaymentStatuses,omitempty,brackets"`
+	DeliveryTypes   []string `json:"deliveryTypes,omitempty"`
+	PaymentStatuses []string `json:"PaymentStatuses,omitempty"`
 }
 
 // PriceType type.
@@ -821,8 +821,8 @@ type PriceType struct {
 	Description      string            `json:"description,omitempty"`
 	FilterExpression string            `json:"filterExpression,omitempty"`
 	Ordering         int               `json:"ordering,omitempty"`
-	Groups           []string          `json:"groups,omitempty,brackets"`
-	Geo              []GeoHierarchyRow `json:"geo,omitempty,brackets"`
+	Groups           []string          `json:"groups,omitempty"`
+	Geo              []GeoHierarchyRow `json:"geo,omitempty"`
 }
 
 // ProductStatus type.
@@ -853,7 +853,7 @@ type StatusGroup struct {
 	Active   bool     `json:"active,omitempty"`
 	Ordering int      `json:"ordering,omitempty"`
 	Process  bool     `json:"process,omitempty"`
-	Statuses []string `json:"statuses,omitempty,brackets"`
+	Statuses []string `json:"statuses,omitempty"`
 }
 
 // Site type.
@@ -915,9 +915,9 @@ type Product struct {
 	Recommended  bool              `json:"recommended,omitempty"`
 	Active       bool              `json:"active,omitempty"`
 	Quantity     float32           `json:"quantity,omitempty"`
-	Offers       []Offer           `json:"offers,omitempty,brackets"`
-	Groups       []ProductGroup    `json:"groups,omitempty,brackets"`
-	Properties   map[string]string `json:"properties,omitempty,brackets"`
+	Offers       []Offer           `json:"offers,omitempty"`
+	Groups       []ProductGroup    `json:"groups,omitempty"`
+	Properties   map[string]string `json:"properties,omitempty"`
 }
 
 // DeliveryHistoryRecord type.
@@ -940,8 +940,8 @@ type DeliveryShipment struct {
 	Time            *DeliveryTime     `json:"time,omitempty"`
 	LunchTime       string            `json:"lunchTime,omitempty"`
 	Comment         string            `json:"comment,omitempty"`
-	Orders          []Order           `json:"orders,omitempty,brackets"`
-	ExtraData       map[string]string `json:"extraData,omitempty,brackets"`
+	Orders          []Order           `json:"orders,omitempty"`
+	ExtraData       map[string]string `json:"extraData,omitempty"`
 }
 
 // IntegrationModule type.
@@ -973,8 +973,8 @@ type Integrations struct {
 // Delivery type.
 type Delivery struct {
 	Description           string              `json:"description,omitempty"`
-	Actions               map[string]string   `json:"actions,omitempty,brackets"`
-	PayerType             []string            `json:"payerType,omitempty,brackets"`
+	Actions               map[string]string   `json:"actions,omitempty"`
+	PayerType             []string            `json:"payerType,omitempty"`
 	PlatePrintLimit       int                 `json:"platePrintLimit,omitempty"`
 	RateDeliveryCost      bool                `json:"rateDeliveryCost,omitempty"`
 	AllowPackages         bool                `json:"allowPackages,omitempty"`
@@ -1023,8 +1023,8 @@ type Telephony struct {
 	OutputEventSupported bool             `json:"outputEventSupported,omitempty"`
 	HangupEventSupported bool             `json:"hangupEventSupported,omitempty"`
 	ChangeUserStatusURL  string           `json:"changeUserStatusUrl,omitempty"`
-	AdditionalCodes      []AdditionalCode `json:"additionalCodes,omitempty,brackets"`
-	ExternalPhones       []ExternalPhone  `json:"externalPhones,omitempty,brackets"`
+	AdditionalCodes      []AdditionalCode `json:"additionalCodes,omitempty"`
+	ExternalPhones       []ExternalPhone  `json:"externalPhones,omitempty"`
 }
 
 // AdditionalCode type.
@@ -1041,7 +1041,7 @@ type ExternalPhone struct {
 
 // Warehouse type.
 type Warehouse struct {
-	Actions []Action `json:"actions,omitempty,brackets"`
+	Actions []Action `json:"actions,omitempty"`
 }
 
 // Action type.
@@ -1073,7 +1073,7 @@ type CostRecord struct {
 	CostItem string   `json:"costItem,omitempty"`
 	UserId   int      `json:"userId,omitempty"`
 	Order    *Order   `json:"order,omitempty"`
-	Sites    []string `json:"sites,omitempty,brackets"`
+	Sites    []string `json:"sites,omitempty"`
 }
 
 // Cost type.
@@ -1089,7 +1089,7 @@ type Cost struct {
 	CreatedBy string   `json:"createdBy,omitempty"`
 	Order     *Order   `json:"order,omitempty"`
 	UserId    int      `json:"userId,omitempty"`
-	Sites     []string `json:"sites,omitempty,brackets"`
+	Sites     []string `json:"sites,omitempty"`
 }
 
 // File type.
@@ -1133,7 +1133,7 @@ CustomDictionaries related types
 type CustomDictionary struct {
 	Name     string    `json:"name,omitempty"`
 	Code     string    `json:"code,omitempty"`
-	Elements []Element `json:"elements,omitempty,brackets"`
+	Elements []Element `json:"elements,omitempty"`
 }
 
 // Element type.