syncing.SynchronizationClient is obscure

[xapple]

It seems like something really useful, to automatically sync datasets to a CKAN instance, but I can't figure out how it works. The documentation is very vague. It says:

data – Data to be synchronized. Should be a dict (or dict-like) with top level keys coresponding to the object type, mapping to dictionaries of {'id': object}.

But so what is <object> supposed to be like ? What dictionary should I call that method with ? An example usage would really be welcome.