# description
Acknowledgement that the event was recorded. Answered 202: the row is written synchronously, but everything the event sets in motion (sequence enrollment, waking a parked enrollment) is not.

# properties.email.description
The address the event is about, normalized to lowercase.

# properties.duplicate.description
true when a `dedupeKey` matched an event already recorded — nothing new was written and `id` is the original's.