We have an App Store Server Notification endpoint. Our app offers an in app subscription. Most notifications have all of the expected fields, but in a small number of cases the decoded signedTransactionInfo and signedRenewalInfo fields are empty. I can't see anything about these fields being optional in the documentation, and without the transaction information I can't get the transaction id of the user, so I can't tell how this notification relates to others for the same original transaction id. Are these notifications expected? Should I be handling them in a special way? Or should I just ignore them? For example, a normal transaction will have the following fields: responseBodyV2DecodedPayload (     [notificationType] => DID_RENEW     [notificationUUID] => …     [version] => 2.0     [signedDate] => 1660947328849     [data] => (             [bundleId] => com.playpokpok.playroom             [bundleVersion] => 9             [environment] => Sandbox             [signedTransactionInfo] => JWSTransactionInfo             [signedRenewalInfo] => JWSRenewalInfo         ) ) But one of these unexpected requests will have the following form: responseBodyV2DecodedPayload (     [notificationType] => EXPIRED     [subtype] => VOLUNTARY     [notificationUUID] => …     [version] => 2.0     [signedDate] => 1662661854606     [data] => (             [appAppleId] => 1550204730             [bundleId] => com.playpokpok.playroom             [bundleVersion] => 6             [environment] => Production         ) )