iOS 调用push api返回bad request (400)

先附上代码

NSURL *baseUrl = [NSURL URLWithString:@"https://api.jpush.cn"];

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"json" inDirectory:@"JsonData"];
NSData *data = [NSData dataWithContentsOfFile:filePath];

NSError *error;
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];

AFHTTPSessionManager *httpSessionMgr = [[AFHTTPSessionManager alloc]initWithBaseURL:baseUrl];
[httpSessionMgr.requestSerializer setAuthorizationHeaderFieldWithUsername:AppKey password:MasterSecret];

[httpSessionMgr POST:@"v3/push" parameters:jsonObject success:^(NSURLSessionDataTask * _Nonnull task, id  _Nonnull responseObject) {
    NSLog(@"success");
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    NSLog(@"failed %@", error.description);
}];

test.jonson的内容
{
    "platform": "all",
    "audience": "all",
    "notification": {
        "ios": {
            "alert": "Hi, JPush!",
            "sound": "default",
            "badge": "+1",
            "extras": {
                "newsid": 321
            }
        }
    },
    "options": {
        "time_to_live": 60,
        "apns_production": false
    }
}

这是一个测试push api给自己的应用发送推送的测试工程。appkey和masterSecret都设置正确，运行后错误，显示failed Error Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: bad request (400)" UserInfo={com.alamofire.serialization.response.error.response=<NSHTTPURLResponse: 0x17003b640> { URL: https://api.jpush.cn/v3/push }

求助时代码哪里有问题导致了这个错误码？