matt on Nostr: What NIP does this use?

{ "id": "623c482ad61b7772b3850a8ca67ec5d9928a3e81b4ef11f9f08e0d0b6256e3da", "pubkey": "df56b7c6a3d12ef1569f3c3a3704ac2e19faf65839891edd5b14aed12318d202", "created_at": 1700253940, "kind": 1, "tags": [ [ "e", "d96610a5bf71c2cfb199bf203609c9ba6429d13dec74b93521a43c00dd02f406" ], [ "p", "fa984bd7dbb282f07e16e7ae87b26a2a7b9b90b7246a44771f0cf5ae58018f52" ] ], "content": "What NIP does this use?", "sig": "3da2f029041fe7f7d21c1de1c442a0cf48f98d143ed81fa95f314d3aa363ff0496e828ea647d6807eb7cbd5d7a8da64e0e059cbfd672f90e080fad67de58046b" }