Receive post json from request on silex

curl.sh

curl http://127.0.0.1:8080/api/v1/test -d '{"type":"limit","event":"incident"}' -H 'Content-Type: application/json'

routing.php

<?php

use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;

$app->before(function (Request $request) {
    if (0 === strpos($request->headers->get('Content-Type'), 'application/json')) {
        $data = json_decode($request->getContent(), true);
        $request->request->replace(is_array($data) ? $data : []);
    }
});

$app->post('/api/v1/test', 'test.controller:index');

$app->error(function (\Exception $e) use ($app) {
    return new JsonResponse($e->getMessage());
});

TestController.php

<?php

final class TestController extends SomeBaseController
{
    private $someService;

    public function __construct(SomeService $someService)
    {
        parent::__construct($someService);
        $this->someService = $someService;
    }

    public function test(Request $request): JsonResponse
    {
        $type  = $request->request->get('type');
        $event = $request->request->get('event');
        //Now you can manipulate this vars.
        $this
          ->someService
          ->execute($type, $event);
    }
}