id | name          | value       | type    |
1  | Test_Array    | [somearray] | array   |
2  | Test_Boolean  | someboolean | boolean |

protected function getCastType($key) {
  if ($key == 'value' && !empty($this->type)) {
    return $this->type;
  } else {
    return parent::getCastType($key);
  }
}

$model == (new Model(['type' => $data['type']))->fill($data)->save();