Edit 
				
					{
  "id": "_ID_",
  "jsonrpc": "2.0",
  "api": "1.0",
  "method": "hub.item.group.get",
  "params": {
    "id": "<item group id>"
  }
}
Edit 
				
					{
  "api": "1.0",
  "error": null,
  "id": "633216245ab7be12415365c4",
  "result": {
    "_id": "633216245ab7be12415365c4",
    "name": "switches", 4
    "itemNames": [ "switch" ],
    ... all other fields ...
    "persistent": false
  }
}