$data = json_decode('{
        "empType": {
            "id": "sdf",
            "title": "Part Time",
            "status": 1
        },
        "salutation": "Mr",
        "name": "Shihabuddeen",
        "employee_code": "EMP1001"
    }', true);

    $validator = \Validator::make($data, [
        'salutation' => ['required'],
        'name' => ['required', 'max:100'],
        'employee_code' => ['required', 'max:100'],
        "empType.id" => ['required', 'integer'],
    ]);

    dd($validator->passes()); // true