This record belongs to the nano service of the same name in the SYSTEM namespace. The node registry informs that data is available for a newly added node. Interested parties who stick an observer to this nano service will get this message sent to them.

  "id": "1b1ae72c-fa70-42ab-a43c-eabb4ee71ada",
  "namespaces": "SYSTEM",
  "description": "Notification that a node record has been updated.",
  "slots": [
      "key": "1",
      "name": "REMOTE_NODE",
      "direction": "REQUEST",
      "mandatory": "true",
      "type": "NODE_ADDRESS",
      "description": "The remote node."
} - Innovative Distributed System