Get Test Notification Status method does not return the full data in signedPayload

Hi, I'm trying to implement App Store Server Notifications V2 for my application. At first, I wanted to test the notification using the "Get Test Notification Status" method. I got testNotificationToken from the "Request a Test Notification" method, the response code is 200 and signedPayload after decoding it looks like this:

{
   "notificationType": "TEST",
   "notificationUUID": "***",
   "date": {
     "bundleId": "***",
     "environment": "Sandbox"
   },
   "version": "2.0",
   "signedDate": 1697535213846
}

it is missing the most important thing for me, signedTransactionInfo in data. According to the documentation, I should get something like this: https://developer.apple.com/documentation/appstoreservernotifications/data

What could be the reason for an incomplete response? Could this be the correct answer after all?