Android : Parameter not getting posted POST request Android

I am sending a POST request to a Azure based active directory.

Iam sending certain parameters as form encoded to my end point.

Iam doing something like so:-

 HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(Constants.Endpoint);

        try 
        {
            // Set header with Token
            httppost.setHeader("Authorization", Token);

            //Add parameters as Form encoded
            List <NameValuePair> nvps = new ArrayList <NameValuePair>(5);
            nvps.add(new BasicNameValuePair("Comment", comment));

            nvps.add(new BasicNameValuePair("Time", time));
            nvps.add(new BasicNameValuePair("Location",location));
            nvps.add(new BasicNameValuePair("CreatedBy",username));
            AbstractHttpEntity entity;
            entity = new UrlEncodedFormEntity(nvps, HTTP.UTF_8);
            entity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");
            entity.setContentEncoding("UTF-8");
            httppost.setEntity(entity);

            //Fetch the response
            HttpResponse responsenext = httpclient.execute(httppost);

            HttpEntity entitynext = responsenext.getEntity();
            AddedResult= EntityUtils.toString(entitynext);


        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

When I debug my application, I get all correct values in nvps. Also all the values except "CreatedBy" parameter are posted properly. But the response I get is as follows:-

{"Id":24,"Location":"Home","Time":"2014-09-11T14:53:29","Comment":null,"CreatedBy":"","Created":"2014-09-11T09:16:50.8886079Z"}

Here the "CreatedBy" value gives a empty String if I send the request from my device.

If I make the same request from Google chrome's Postmaster with same parameters, the "CreatedBy" field is also filled with the value I pass.

Any help would be appreciated