coin on Nostr: which NIP is it?

{ "id": "06e2e50fbc7f81f08f8b46619f0831dcf7e5e95395202a5cf1958ea665d22681", "pubkey": "f5dce68e49a6bdbafa7e11a42f3bbe5bcc21e071531375d886d3bba92399fcbb", "created_at": 1732489843, "kind": 1, "tags": [ [ "e", "cd4dfe1aa3aa1bd54014792745ece8fa8c1054afd197c6f944cf1deae2955211", "wss://ditto.pub/relay", "root", "3f770d65d3a764a9c5cb503ae123e62ec7598ad035d836e2a810f3877a745b24" ], [ "e", "4157c504db2a978cb771eeff114c65808531929ac5b4fed55761ca110a61f4fb", "wss://ditto.pub/relay", "reply", "c3ae4ad8e06a91c200475d69ca90440d6d54de729d3d1e5afacfbdb6e54d46cb" ], [ "p", "c3ae4ad8e06a91c200475d69ca90440d6d54de729d3d1e5afacfbdb6e54d46cb", "wss://ditto.pub/relay" ] ], "content": "which NIP is it?", "sig": "028f03df66cf956df43e02d6404e9b2ff6c13d2ba88a15b84bb64314e2f86c57075e5bb1ccc2e190d98993258eb771f8d88ed365e941838281430f1ff6ed9115" }