I am using AFNetworking to make a POST request to a web service

This is the JSON that I need to send-

{
   “LinkedTo” : {
                            “IndividualStakeholder” : “”,
                            “GroupedStakeholder” : “”,
                            “LandParcelStakeholder” : “”,
                            “Communications” : “”,
                            “Team” : “”,
                            “Issue” : “”,
                            “Event” : “”
                        }
   “userId” : 170,
   “projectId”: 12
}

This is the code I am using –

NSString *jsonData = [self JSONString:jsonData1];

The value in NSString *jsonData at this point is

{\"LinkedTo\":{\"IndividualStakeholder\":\"\",\"GroupedStakeholder\":\"\",\"LandParcelStakeholder\":\"\",\"Communications\":\"\",\"Team\":\"\",\"Issue\":\"\",\"Event\":\"\"},\"userId\":170,\"projectId\":4}

NSURL *url = [[NSURL alloc]initWithString:@"https://somedomain.com/"];
AFHTTPClient *httpClient = [[AFHTTPClient alloc]initWithBaseURL:url];
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                             jsonData, @"jsonText" , nil];
NSURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"https://somedomain.com/api/stakeholders" parameters:params];

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request 
    success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON){
        NSLog(@"Inside the success block %@",JSON);
    }
    failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON){
        NSLog(@"json text is: %@", JSON);
        NSLog(@"Request failed with error: %@, %@", error, error.userInfo);
    }];
[operation start];



-(NSString*)JSONString :(NSString*)aString{
    NSMutableString *s = [NSMutableString stringWithString:aString];
    [s replaceOccurrencesOfString:@"\"" withString:@"\\\"" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"/" withString:@"\\/" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\n" withString:@"\\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\b" withString:@"\\b" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\f" withString:@"\\f" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\r" withString:@"\\r" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\t" withString:@"\\t" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    return [NSString stringWithString:s];
}

The error on the server is – Request format is unrecognized for URL unexpectedly ending in '/stakeholders'. Which is an error in asp.net throws when deserializing the posted JSON

The output I am receiving on the client is

Request failed with error: Error Domain=com.alamofire.networking.error Code=-1011 "Expected status code [number of indexes: 100 (in 1 ranges), indexes: (200-299)], got 500" UserInfo=0x8e95e60 {NSErrorFailingURLKey=https://somedomain.com/api/stakeholders, NSLocalizedDescription=Expected status code [number of indexes: 100 (in 1 ranges), indexes: (200-299)], got 500}, {
NSErrorFailingURLKey = "https://somedomain.com/api/stakeholders";
NSLocalizedDescription = "Expected status code [number of indexes: 100 (in 1 ranges), indexes: (200-299)], got 500";
}
2013-02-25 11:03:44.669 NetworkPlugin[60069:c07]