test on Nostr: Hello world

{ "id": "fced1ab8d96a33d5820a76010a95fae88b4beb1d365e537b910014bb3e68a577", "pubkey": "972f233aa467bc9804032c0bce0a117daead5473c56c91e811a216bdd08c08cf", "created_at": 1725920812, "kind": 1, "tags": [], "content": "Hello world", "sig": "48bd336e899ff79dbc4853fc3291e8cdf18b361da198c535ea0df0567d4f8ceb06e00d2b020e7f1c10a55a8ac9707baefac0723cd4aaec0e7bf1b2bf653e6a3f" }