I'm having trouble retrieving my form Data that has been submitted via ajax like this:

$( "form" ).on( "submit", function( event ) {
    var formData = $(this).serializeArray();
    console.log("fomData");
    $.ajax({
        url: window.location.origin+ "/selfservicemanager/localtmfsetup/local_tmf_setup.php",
        type: "POST",
        data: JSON.stringify(formData),
        success : function (){
            alert("success");
        }       
    });
});

I can see the data being sent over the network like this:

But when I try to retrieve the data on the server side the $_POST array is empty.

<?php
var_dump($_POST);
die();
?>


array (size=0)
  empty

Any ideas? I've tried to stringify the data being sent, and also tried to decode the $_POST array but it expects a string.....