{
  "$ref": "core/room_event.json",
  "type": "m.room.message",
  "content": {
    "body": "Human-readable message to explain the notice",
    "msgtype": "m.server_notice",
    "server_notice_type": "m.server_notice.usage_limit_reached",
    "admin_contact": "mailto:server.admin@example.org",
    "limit_type": "monthly_active_user"
  }
}