curl --request GET \
  --url https://api.example.com/api/v1/network/registered-nodes

{
  "registered_nodes": [
    {
      "admin_key": {
        "_type": "ProtobufEncoded",
        "key": "421050820e1485acdd59726088e0e4a2130ebbbb70009f640ad95c78dd5a7b38"
      },
      "created_timestamp": "1586567700.453054001",
      "description": "alpha",
      "registered_node_id": 1,
      "service_endpoints": [
        {
          "ip_address_v4": "128.0.0.6",
          "port": 50216
        }
      ],
      "timestamp": {
        "from": "187654.000123457",
        "to": null
      }
    }
  ],
  "links": {
    "next": null
  }
}