Laravel ajax form validation with form serialize not working

Sending ajax request with form serialize data to controller and validating there but keep showing error even field is already filled with data.

var formData = form.serialize();

$.ajax({
type: "POST",
url: url,
method: 'post',
data: {"data": formData},
headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')},
dataType: "json", 


    public function store(Request $req)
{

    parse_str($req->formData, $data);
    $validator = Validator::make($data, [
        'hotel_name' => 'required',
        'company_name' => 'required|numeric',
        'hotel_country' => 'required',
        'hotel_city' => 'required|alpha',
        'hotel_area' => 'required|alpha',
        'hotel_address' => 'required|alpha_dash'
    ]);

    if ($validator->fails()) {
        return array(
            'success' => false,
            'errors' => $validator->getMessageBag()->toArray()
        );
    }

}

Keep returning false

via Chebli Mohamed