Get data posted by $.ajax via $request argument of Controller method – Jquery ajax

I’m using the following code to post an array of objects to an api Controller.

$.ajax({
 url: "/api/links", 
 method:"post" , 
 data:  JSON.stringify(  this.results  )  , 
 contentType: 'application/x-www-form-urlencoded',
 context:this ,
 success:
  function(res){
     $("#res").html(res);
   }
});  

The problem is $_POST array is empty while I could get the raw posted data using $raw = file_get_contents(“php://input”).
Somebody offered to use this:

$_POST = json_decode($rawdata, true);

It may fill the $_POST and solve the problem but I’m using Laravel so I’m supposed to use the $request (of type Request) parameter of Controller method not pure PHP.
So I think there is a right and Laravel way for handling this.

By the way $rawdata is precisely what I’ve posted to the controller which is something like this:
[{“id”:484,”LinkTitle”:”contactus”,”URL”:”https://url1…”},{“id”:485,”LinkTitle”:”faq”,”URL”:”/faq”}]

I also tried wrapping it with {} before serializing in order to make it an object:

JSON.stringify(  {"myData":this.results}  )

This way $_POST array was filled but not in a normal way.
All I want is to access LinkTitle via $_POST which means I would be able to use $request argument passed to controller’s method so i can do other things like validation etc…

EDIT : Like @AmeyaJoshi said it’s array of objects and not just object/array. So I can’t get it via $_POST[“LinkTitle”] . All I said here is because I imagine if $_POST is populated correctly then I can use $request to validate and save my records at once via eloquent.Thank you

EDIT2: I tried removing stringify like
katsarov said and result of print_r($_POST,true) is

Array
(
    [undefined]  =>; 
)

and result of dd($request->all()) is

array:1 [▼
  "undefined" => null
]