test on Nostr: Hello world

{ "id": "c90bef22eb5738a38190d50a45feb39b17e304037772a509f4faba3e2fd44fe2", "pubkey": "972f233aa467bc9804032c0bce0a117daead5473c56c91e811a216bdd08c08cf", "created_at": 1731200606, "kind": 1, "tags": [], "content": "Hello world", "sig": "f4bd94915658000a3dafdfa51e41a69599220f4232fc82a510adad5d015abbdf1539332672cabd8ccc98f573957295144fc8c8e049d45f6a897c8f63f60fb2fe" }