I copied nostr-tools and used a REQ with an impossible author's pubkey.
https://github.com/hzrd149/applesauce/blob/master/packages%2Frelay%2Fsrc%2Frelay.ts#L134-L137
hzrd149
npub1ye…pknpr
2026-04-18 12:28:30 UTC
in reply to nevent1q…kdkz
Author Public Key
npub1ye5ptcxfyyxl5vjvdjar2ua3f0hynkjzpx552mu5snj3qmx5pzjscpknprSeen on
wss://pyramid.fiatjaf.com