Analysis for Spotify tracks

Thank you for the swift answer!

Perhaps I am doing something wrong, but e.g. requesting the chart topper "Rather Be" like this:

http://developer.echonest.com/api/v4/track/profile?api_key=&format=json&id=spotify-WW:track:3s4U7OHV7gnj42VV72eSZ6&bucket=audio_summary

gives: "audio_summary": {}

as well as pretty much anything on the Spotify "Top List".

Also, going to Disclosure's artist page, grabbing the Spotify URI for the track "Latch" gives me: spotify:track:51ODNNDZm21HU7wI7cccRr

Followingly I do the query: http://developer.echonest.com/api/v4/track/profile?api_key=&format=json&id=spotify-WW:track:51ODNNDZm21HU7wI7cccRr&bucket=audio_summary

which returns: "The Identifier specified does not exist"

Perhaps there is some confusion regarding how to use the Spotify URI relative to the spotify-WW id? But for older tracks this way works most of the time...