mx.data.create({
  entity: "MyFirstModule.Entity",
  callback: function (obj) {
    obj.set('Attribute', 'lwg');
    mx.data.commit({
      mxobj: obj,
      callback: function () {
        console.log("Object committed");
      },
      error: function (e) {
        console.error("Could not commit object:", e);
      }
    });
  },
  error: function (e) {
    console.error("Could not commit object:", e);
  }
});