Can't add spotify tracks to a taste profile

I'm getting "couldn't resolve item" for every item when I check the ticket of my taste profile update request. Here's the format of what one song looks like when I read the taste profile using http://developer.echonest.com/api/v4/tasteprofile/read?api_key=API_KEY&format=json&id=CASFBKX1475ECD52C7

{"last_modified": "2014-07-22T16:00:22", "date_added": "2014-07-22T16:00:21", "request": {"item_id": "CASFBKX1475ECD52C71475ECD58B3AHXFT", "track_id": "spotify:track:1nAE9RcRE4IZTDNCa0xvht"}}

Is there something wrong with this format? What am I missing?