ListLearningGroupItemsResponse

{
    "items": [
        {
            "itemId": "string",
            "itemType": "activity",
            "itemData": {
                "property1": "string",
                "property2": "string"
            }
        }
    ],
    "nextToken": "eyJwayI6IndvcmtzcGFjZUlkI3pPR0JndVctQWoiLCJxdWl6SWQiOiItRktBdDZfbXM4M3RvSUZaLWVjeFQifQ=="
}