This is a partial update: Id is mandatory on every record and only the fields supplied are changed.
Any field left null keeps its stored value. When Name, Sequence, Object, CriteriaValue or Action is
supplied it must satisfy the same rules as on create, and whenever Object or CriteriaValue changes
the resulting combination is re-checked so that CriteriaValue remains a valid property path on the
object.

A record is rejected when its identifier does not exist, and also when the submitted values are
identical to the stored ones, because no change was detected.

Partial success is supported; if some records are invalid or fail to update, the response
will include details for each record and use status code 207 (Multi-Status). The order of responses corresponds
to the order of input records.