Jem Aswad Senior Music EditorIn what may be the biggest single-artist music-catalog deal to date, a report in Billboard claims that Bruce Springsteen has sold his entire recorded-music and publishing catalog to Sony Music for around $500 million, topping Bob Dylan’s sale of his publishing to Universal for nearly $400 million.Reps for Springsteen and Sony Music either declined or did not respond to requests for comment, but multiple industry sources tell Variety that “the deal is done.”News of