           "properties": {
                "subscriptionId": {
                    "$ref": "#/definitions/subscriptionId"
                },
                "error": {
                    "$ref": "#/definitions/error"
                },
                "timestamp": {
                    "$ref": "#/definitions/timestamp"
                }
            }
        }

      </pre>

      <h3>Unsubscribe</h3>
      <pre>
        {
            "$schema": "http://json-schema.org/draft-04/schema#",
