NSDictionary *user=[[NSDictionary alloc]initWithObjectsAndKeys:@"hiteshp",@"userName",@"12345^",@"password", nil];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
AFHTTPRequestSerializer *requestSerializer = [AFHTTPRequestSerializer serializer];
[requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
manager.requestSerializer=requestSerializer;   //[AFJSONRequestSerializer serializer];
[manager POST:@"myURL" parameters:user success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@ %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

NSString *finalyToken = [[NSString alloc]initWithFormat:@"Bearer %@",user.token];
 AFHTTPRequestOperationManager *manager =
[[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:@"https://server1.appscserver.de/api"]];
[manager.requestSerializer setValue:finalyToken forHTTPHeaderField:@"Authorization"];

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", @"application/json", nil];

//Authorization
[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:userName password:password];

NSDictionary *parameters = @{@"key1": @"value1",
                             @"key2": @"value2"};

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

    manager.responseSerializer = [AFJSONResponseSerializer serializer];

    [manager POST:[NSString stringWithFormat:@"http://%@", Url] parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);

    }];