Getting Rdio track ID from WhoSampled track ID

Thanks for the reply. However, the call you specified returned this:

{"response": {"status": {"version": "4.2", "code": 0, "message": "Success"}, "songs": [{"artist_id": "ARLHO5Z1187FB4C861", "title": "Intergalactic (Digitally Remastered 99)", "id": "SOLHFWG12B0B80B78F", "artist_name": "Beastie Boys", "artist_foreign_ids": [{"catalog": "rdio-US", "foreign_id": "rdio-US:artist:r232323"}]}]}}

There's still on Rdio track ID being returned there. I'd like to be able to get the Rdio track ID based on a WhoSampled track ID.