NotifyFileDownloadComplete   
    data class NotifyFileDownloadComplete(val clientIdentifier: ClientIdentifier, val fileUUID: UUID, val fileName: String) : FileApiInternals.In
Parameters
clientIdentifier 
The ClientIdentifier of the device that signals the download completed
fileUUID 
The UUID of the file (under which it was received / stored).
fileName 
The original fileName of the file as it was provided to the API.