Wiz Khalifa and Charlie Puth's 2015 "See You Again" single is a massive hit. The Furious 7 soundtrack cut is the most-watched YouTube video of all time with nearly 3 billion views and spent 12 weeks at No. 1 on the Billboard charts (which is the longest run ever for a rap song).

Now, one of the song's backup singers is auctioning off their portion of the rights to future royalties from the song.

Taking place on a site called Royalty Exchange, the current highest bid is $32,000 as of Thursday afternoon. Up for auction is 100% of the singer's U.S. digital performer royalties as well as a 30% share of international royalties (with the majority of revenue coming from satellite radio and digital streaming​).

For some clues about exactly how much these royalties are worth, the site says the seller has earned $11,372 over the past 12 months for these "non-featured performer digital performance royalties," which are paid annually. The investment term lasts for the life of the author plus 70 years.

While a fairly new phenomenon, this kind of sale isn't totally unique. Royalty Exchange has previously hosted royalty auctions for songs performed by Jay Z, Dr. Dre, Chris Brown, and more. But this is the highest-charting, most lucrative single auctioned so far. You can see the listing here and revisit the music video for "See You Again" below.