{
  "object": "list",
  "data": [
    { "id": "ch_9f2a", "name": "telemetry.prod", "protocol": "websocket", "retention_hours": 24 },
    { "id": "ch_1c88", "name": "alerts.pager", "protocol": "websocket", "retention_hours": 72 },
    { "id": "ch_70de", "name": "presence.edge", "protocol": "sse", "retention_hours": 6 }
  ]
}