You can send a list of event summaries for a user. Each event summary should contain the event name, the time the event occurred, and the number of times the event occurred. The event name should be a past tense "verb-noun" combination, to improve readability, for example updated-plan
.
{ "user_id": "314159", "event_summaries": { "event_name": "invited-friend", "count": 1, "first": 1671028894, "last": 1671028894 } }