Creating nodes with services module

nodes.services.js

function getLocationAndPost() {
  'use strict';
  navigator.geolocation.getCurrentPosition(function (position) {
    var url = 'http://example.com/enpoint' + '/node.json'; //endpoint URL
    var lat = position.coords.latitude;
    var lon = position.coords.longitude;
    var date = new Date();
    var timestamp = Math.round(date.getTime() / 1000);
    var node_object = {
      "type": "some_type", //set this to your content type
      "uid": 1,  
      "field_geo": { "und": { 0 : { //my geofield is called field_geo
        "wkt": "POINT (" + lon + " " + lat + ")",
        "geo_type": "point",
        "lat": lon,
        "lon": lat,
        "top": lon,
        "bottom": lon,
        "left": lat,
        "right": lat } }
      },
      "title": "Big brother sees you",
      "body": { "und": { 0 : { "value": "Put some body value here if you want" } } },
      "created": timestamp, 
      "status": 1 // Set to 1 for Published. O for unpublished.
    };
    $.ajax({
      url: url,
      type: "POST",
      data: node_object,
      success: function() {
        alert('Success!');
      }
    });
  });
}