How to get primitive json request payload in Laravel 5?

Let say that this is the payload of a request:

{name : 'John', age: 42}

You can get all paramters with Request::all().

How do I get request payload correctyly if payload is a primitive type like true or 42?

Request::getContent() receives them as strings, I want them to be in correct type as well.

via Chebli Mohamed