Eliot catches JSONDecodeError when parsing request payloads. There are a couple of UnicodeErrors in Sentry, which should probably be treated the same way as JSON errors: https://mozilla.sentry.io/issues/5348576657/?project=4504952027545600&project=6700119&project=6700123&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=14d&stream_index=2

UnicodeDecodeError: 'utf-32-be' codec can't decode byte 0x00 in position 23692: truncated data
  File "falcon/app.py", line 365, in falcon.app.App.__call__
    responder(req, resp, **params)
  File "markus/main.py", line 515, in _timer_decorator
    return fun(*args, **kwargs)
  File "eliot/symbolicate_resource.py", line 684, in on_post
    payload = _load_payload(req)
  File "eliot/symbolicate_resource.py", line 577, in _load_payload
    return json.load(req.bounded_stream)
  File "__init__.py", line 293, in load
    return loads(fp.read(),
  File "__init__.py", line 341, in loads
    s = s.decode(detect_encoding(s), 'surrogatepass')
  File "encodings/utf_32_be.py", line 11, in decode
    return codecs.utf_32_be_decode(input, errors, True)

https://mozilla.sentry.io/issues/5348576657/events/613bfb4009bd4f3294447d0a3f01171e/