I am trying to create new items by supplying a large-ish JSON structure,
but I keep getting "The serialization is invalid". Sadly, that does not
tell me which part is invalid.
Can anyone see what's wrong? (I suspect the references, but I don't want to
create unreferenced testing items, and
test.wikidata.org has different
properties apparently...)
https://tools.wmflabs.org/paste/view/7b2aab11
Cheers,
Magnus