When OneRepublic released Human after several years of delays, the "salvatore513" file would have appeared on music blogs and forums within hours of the album hitting New Zealand's time zone. For many fans in countries with limited access to streaming services, or those who preferred local MP3 files for their personal libraries, finding this specific "rar" was the primary way to hear the new music.
This is likely the username of the original uploader or "ripper." In the world of online music sharing, certain uploaders gain reputations for providing high-quality, verified files.
A compressed archive file. Before streaming dominated, fans would "pack" entire albums into these archives to make them easier to upload and download from sites like MediaFire, Mega, or Zippyshare. The Digital Context