The success or error information and the date the App Store server records when it attempts to send a server notification to your server.
sendAttemptItem
Optional
The date the App Store server attempts to send a notification.
attemptDate
The success or error information the App Store server records when it attempts to send an App Store server notification to your server.
sendAttemptResult
The success or error information and the date the App Store server records when it attempts to send a server notification to your server.
sendAttemptItem