{
  "anonymous_id": "569a0e86-0484-4a84-afa8-cc55b76fe5c4",
  "message_id": "07cf5c9f-fbb0-4877-bfad-e158d86978ee",
  "timestamp": "2024-03-20T15:30:00Z",
  "traits": null,
  "user_id": "97980cfea0067"
}

{
  "anonymous_id": "Anonymous identifier for the user before identification",
  "message_id": "Unique identifier for this message",
  "timestamp": "When this identify event occurred",
  "traits": "User traits containing free-form properties like name, email, phone",
  "user_id": "Unique identifier for the user"
}