Swift. Serialization of request parameters

let requestParameters = [
"method": "createUser",
"credentials": [
"login": login,
"password": password,
"age": age,
"notificationSettings": [
"notifyNews": isNotifyNews,
"notifyCabinet": isCabinetNotify
struct LoginRequest: Codable {
struct Credentials: Codable {
struct NotificationSettings: Codable {
var notifyNews: Bool
var notifyCabinet: Bool

var login: String
var password: String
var age: Int
var notificationSettings: NotificationSettings

var method: String
var credentials: Credentials
let requestParameters = [
"email": email,
"firstName": firstName,
"age": age
where Key == String



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