chromium/content/test/data/site_isolation/json.wav

{"non-empty JSON object" : "..."}

We expect CORB (but not ORB) to block this JSON file (even though it is
mislabeled as audio/x-wav).  For some prior discussion see
https://chromium-review.googlesource.com/c/chromium/src/+/3203018/comment/ce77f016_94a92aa8/