{
  "event_id": "event-demo-1",
  "operation_id": "operation-demo-1",
  "tenant_id": "tenant-demo",
  "actor_id": "admin-demo",
  "target_member_id": "member-demo",
  "action": "member.role.update",
  "previous_role": "viewer",
  "next_role": "editor",
  "outcome": "committed",
  "business_revision": 42,
  "policy_revision": "policy-demo-7",
  "occurred_at": "2026-09-05T12:00:00Z",
  "observed_at": "2026-09-05T12:00:02Z"
}