I am making a POST request to the MOXTRA API and it should return me the following response :

{

"data":

{

"id": user_id, //some user id
"revision": 5,
"name": "My First Binder",
"created_time": 1402384947587,
"updated_time": 1402384947587
},

"code": "RESPONSE_SUCCESS"
}

And I am making this POST request using Java Script

var d = 

    {
      'name': 'My First Binder'
    };

var bind = JSON.stringify(d);

$.post('https://api.moxtra.com/user_id/binders?access_token=' + access_token+ '&callback=?', bind, function(response) {

  alert( response.data.id);

},'json');
    })

But the alert that i get for alert(response.data.id) is "undefined" and the alert if i write alert(response.code) is "RESPONSE_SUCCESS"

What is wrong with the above code , how am i getting a response success and getting undefined at the same time