How to send real JSON object to server with quotation?

I have a variable like this:

$scope.task.gallery=[ 
       {"name": "XCB808tvXNpqXKqekA2HlkJ8H.jpg","size":5112}, 
       {"name": "s6kA6B0e5m1sdSAjPXqNwtiy4.jpg", "size": 13135} 
];

But when get this in server, show me object without quotation:

[ 
     {name: "XCB808tvXNpqXKqekA2HlkJ8H.jpg",size:5112}, 
     {name: "s6kA6B0e5m1sdSAjPXqNwtiy4.jpg", size: 13135} 
];

I use php Laravel 5.1 for backend in server. when I send with Restangular and use json_decode send me error json_decode() expects parameter 1 to be string, array given.

I think Restangular change variable and then send. how to send array object JSON as real ?

via Chebli Mohamed