{
  "token": "verification-token-not-a-secret",
  "team_id": "TDEMO",
  "api_app_id": "ADEMO",
  "event_id": "Ev_MSG_THREAD_001",
  "event_time": 1782770410,
  "type": "event_callback",
  "event": {
    "type": "message",
    "channel": "C_EXEC",
    "user": "U_ALICE",
    "text": "continue from the prior answer",
    "ts": "1782770410.000200",
    "event_ts": "1782770410.000200",
    "thread_ts": "1782770400.000100",
    "channel_type": "channel"
  }
}