/// <summary>
        /// Create a node notification.
        /// </summary>
        public string CreateNotification(string transactionId, ComplexNotification notification)
        {
            string id         = IdProvider.Get();
            string notifyData = _serializationHelper.SerializeToBase64String(notification);

            DoInsert(TABLE_NAME,
                     "Id;TransactionId;NotifyData",
                     id, transactionId, notifyData);
            return(id);
        }