How do I get artist tracks with Deezer song Ids?

I've done a search for top artists for a given genre. I used the @bucket=id:deezer, so I get the artist name and their Deezer artist ID. I then want to grab the top 3 tracks for each artist... I can't see how I can get Deezer track IDs back though...

"http://developer.echonest.com/api/v4/artist/songs?api_key=" + echonestApi_key + "&id=deezer:artist:" + artistID + "&format=json&results=3";

This gives me "songs": [{"id": "SOTCFIU1313439692F", "title": "Ko Ko"}, ...

That's an EchoNest track ID, not a Deezer one. I can't supply a bucket for the call - how do I do this?