JSON И Юникод

<?php
$cart = array(
  "orderID" => 12345,
  "shopperName" => "Ваня Иванов",
  "shopperEmail" => "ivanov@example.com"
  
);

echo json_encode($cart);


?>

{"orderID":12345,"shopperName":"\u0412\u0430\u043d\u044f \u0418\u0432\u0430\u043d\u043e\u0432","shopperEmail":"ivanov@example.com"}

json_encode($a, JSON_UNESCAPED_UNICODE)

var json = $.parseJSON('тут твоя строка');