The file name.
The voice duration in seconds.
The size of the file in bytes.
The download status of the attachment file. See ChatDownloadStatus.
OptionallastThe user ID of the operator that modified the message last time.
OptionallastThe UNIX timestamp of the last message modification, in milliseconds.
The local path of the file.
OptionalmodifyThe number of times a message is modified.
The path of the attachment file in the server.
The token to download the file attachment.
ReadonlytypeThe message type. See ChatMessageType.
The voice message body.