data class Audio(val fileId: String, val fileUniqueId: String, val duration: Int, val performer: String? = null, val title: String? = null, val fileName: String? = null, val mimeType: String? = null, val fileSize: Long? = null, val thumbnail: PhotoSize? = null)
This object represents an audio file to be treated as music by the Telegram clients.
Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit integer or double-precision float type are safe for storing this value.