InvoiceIssuedNotification

{
    "event": "InvoiceIssued",
    "version": 0,
    "source": {
        "type": "Invoice",
        "data": {
            "id": "string",
            "invoiceNumber": "string",
            "issueDate": "2019-08-24T14:15:22.123Z",
            "attachmentUrls": [
                "http://example.com"
            ],
            "order": {
                "orderNumber": "string"
            }
        }
    }
}