Server-supplied timestamp showing time of Message delivery to receiving registry's inbox queue

stringEnum:
Array [ Success, Warning, Failed]

messages can be failed, if the message has a structure or information that prevent delivery to the receiving registry. This could be incorrect JSON structure and non-existent ION or because the receiving registry does not allow messages from your registry. 

integer
example: 12345

Incrementing integer set by WMDA MatchConnect systems that indicates the order in which the messages were received by the WMDA and therefore the order in which messages should be processed. Each receiving registry has its own unique sequence.