Investigate PayloadTooLargeError - request entity too large
Sentry record - https://push-notifications-sentry.web.cern.ch/sentry/backend/issues/2148/
This can easily happen when a user is writing a notification that is very large, and it is sent to be saved as a draft.
It is also probably easy to reproduce by simply pasting an image in the body, which can easily hit the request size limit.
How to handle this?