symfony/validator: how to validate string as int

I created a contoller in Symfony that will be handle API requests. I want to validate action request. Parameter ‘type’ of the request must be integer. There is controller action code:

public function store(ValidatorInterface $validator, Request $request): JsonResponse
{
    $collection = new Collection([
        'type' => [
            new AssertType('int'),
            new AssertRange(['min' => 1, 'max' => 2])
        ]
    ]);

    $errors = $validator->validate($request->request->all(), $collection);
    if ($errors->count()) {
        dd($errors);
    }

    return new JsonResponse('OK');
}

But when I tested this action via Postman, validation is failed with error “This value should be of type int.” event if I send response with int value:

What is the right way to validate int param or string param as int in Symfony?