JSonDecoder（）Swift 4解码错误

Question

尝试在swift 4中解码Json时出现错误

typeMismatch（Swift.Dictionary，Swift.DecodingError.Context（codingPath：[Swift._DictionaryCodingKey（stringValue：“ThrottleSeconds”，intValue：nil）]，debugDescription：“预计会解码字典而是找到一个数字。”，underlyingError ：零））

Json的回复是

{ “响应”： “4611686018456390681”， “错误码”：1， “ThrottleSeconds”：0 “的ErrorStatus”： “成功”， “消息”： “OK”， “MessageData”：{}}

struct BasicReply: Decodable {

let Response : String?
let ErrorCode : Int?
let ThrottleSeconds : Int?
let ErrorStatus : String?
let Message : String?
let MessageData : String?
}

class NetworkRequests {
let api = apiDetails()


func buildRequests()->String{

    let request = "1/Stats/GetMembershipIdByDisplayName/" + api.userName + "/"

   // let request = "1/Account/" + api.membershipId + "/Summary/"
    return request
}
func request(){


    let destinyURL : String = api.destinyURL + buildRequests()
    let url = NSURL(string: destinyURL)
    let request = NSMutableURLRequest(url: url! as URL)
    request.httpMethod = "GET"
    // add headers
    request.setValue(api.apiKey, forHTTPHeaderField: "X-API-Key")

    let session = URLSession.shared

    let destinySession = session.dataTask(with: request as URLRequest) { (data, response, error) -> Void in
        if let response = response as? HTTPURLResponse {
            let code = response.statusCode
            print(code)
        }

        guard let data = data else {print("No DATA!!!");return}
        let output = String(data: data, encoding: String.Encoding.utf8)
        print("output ", output! as Any)

        do {

            let questions = try JSONDecoder().decode([String: BasicReply].self, from: data)

        } catch let jsonErr {

            print("Error decoding Json Questons", jsonErr)
        }
    }
    destinySession.resume()
}
}