Advanced REST Client to jQuery request

I have an ARC set up by the client and everything seems to be working OK in ARC and the back-end, but I cannot see what I'm doing wrong in jQuery

Here's the ARC test

Here's my jQuery code

$.ajax(
  {
    method: "POST",
    url: "http://ift.tt/2uvVJMW",
    headers: {
      "Platform": "web",
      "Build": 2
    },
    contentType: "application/json; charset=utf-8",
    dataType: 'json',
    data: { "email": "johndoe@server.com" }
  }
)
.done(function (response) {
  console.log('done!');
  console.log(response);
})
.fail(function (response) {
  console.log('fail!!!');
  console.error(response);
});