ExternalTicketChangeModel

{
    "barcode": "string",
    "siteId": "abcdef01-2345-6789-abcd-ef0123456789",
    "reference": {
        "internalLinkUrl": "string",
        "title": "string"
    },
    "items": [
        {
            "reference": "string",
            "name": "string",
            "accountingCategoryKey": "string",
            "taxRate": "123456.78",
            "currencyValue": "123456.78",
            "changes": [
                null
            ]
        }
    ]
}