Parse REST API post in Javascript

gistfile1.js

PARSE_APPLICATION_ID = 123456789;
PARSE_REST_API_KEY = 123456789;

var messageText = "canned alert";
var parseMessage = {
  "channels": "",
  "type": "ios",
  "expiration_interval": 86400,
  "data": {
    "alert": messageText,
    "badge": 0,
    "sound": ""
  }
};

var parseAPIHeaders = {
  'X-Parse-Application-Id': PARSE_APPLICATION_ID,
  'X-Parse-REST-API-Key': PARSE_REST_API_KEY
};

$.ajax({
  type: 'POST',
  headers: parseAPIHeaders,
  url: "https://api.parse.com/1/push",
  data: JSON.stringify(parseMessage),
  contentType: "application/json"
});