bros on Nostr: What is nip 57?

{ "id": "982fcf1bc1178e1c6efc3e826fcbb9d7ef1be7152638a409e378f6110202c1ad", "pubkey": "9e4d08814508c0f98ec0aff2884c5ccf5b03b9931fd14be7a959ae6a97c46363", "created_at": 1676445135, "kind": 1, "tags": [ [ "e", "5d2b2f71788ed0ccc2dbf0fcd1f6ff33cbd68d08d9756a0220288b2c7592410c" ], [ "p", "c4f5e7a75a8ce3683d529cff06368439c529e5243c6b125ba68789198856cac7" ] ], "content": "What is nip 57?", "sig": "b14af7e2a57380bad998a8b24958a3047820ec86325f5eeffb9ffe3b28fe4d7c7a0e37b77e14309a4043ade67a488b4f21d5d188d1a75da232ddb5358dbc6351" }