Sending Json data to Model in MVC

Question

this is my json code for sending value but it not getting at controller end..

$("#submitt").click(function ()

{

var name = $("#txtName").val();

var city = $("#txtCity").val();

var data = { 'name': name, 'city': city };

var obj = JSON.stringify(data);

$.ajax(

{

url: '/Mate/Create',

type: 'POST',

dataType: 'json',

data: {},

contentType: 'application/json; charset=utf-8',

success: function (obj)

{

alert(obj.d);

$("#content").html("Sending..");

}

})

});