private function _createChecksum(array $response)
    {
        $model = new Checksum();
        $model->setId($response['id']);
        $model->setChecksum($response['checksum']);
        $model->setData($response['data']);
        $model->setType($response['type']);
        $model->setAction($response['action']);
        $model->setAppId($response['app_id']);
        $model->setCreatedAt($response['created_at']);
        $model->setUpdatedAt($response['updated_at']);

        return $model;
    }