b10c on Nostr: Where do I sign up?

{ "id": "5d095d1a0403a38eaffed90b8a6e57b64f1bfeb1b4e9a310bc95527d23772868", "pubkey": "b10c0000079a83cf26815dc7538818d8d56a2983e374e30a4143e50060978457", "created_at": 1750862459, "kind": 1, "tags": [ [ "p", "180c517f64f595b1e54bd2ce778ccc2a56b113e5a4b1426d4b0a439083010db1", "wss://nos.lol/", "mention" ], [ "p", "33c8e961d628a494cdb37b9753d0c6d1ee7612cd020a412c9df7f38a766f457e", "wss://a.nos.lol" ], [ "e", "e597654ec5cd44bec19478969dd32bde0187e437b03532e92515762fe8add7d8", "wss://a.nos.lol", "root", "33c8e961d628a494cdb37b9753d0c6d1ee7612cd020a412c9df7f38a766f457e" ] ], "content": "Where do I sign up? \n\n", "sig": "9948b005ead1246cccf99c31856f750838f4a8b3b761a012af1f7766216c37cec3c870c0c26d7487db46ddc2e7af5a60d975758f71ad3e5d373cfd4f4f64ed88" }