<http://schema.org/thumbnailUrl>
<https://success.mindtouch.com/@api/deki/pages/17001/thumbnail>
<https://success.mindtouch.com/Documentation/MindTouch4/Scripting/Enhance_with_APIs/API_calls/site/site%2F%2Fimport%2F%2F%2F%2Fusers_(POST)>