Response-Behavior:

[1] Buckets — Kinto 8.1.5 documentation (2018-02-21 01:03:17 +09:00) <https://kinto.readthedocs.io/en/latest/api/1.x/buckets.html>

If a Response-Behavior request header is set to light, only the fields whose value was changed are returned. If set to diff, only the fields whose value became different than the one provided are returned.