test on Nostr: helloworld!

{ "id": "bea5b0bbc45c9d663d9f4296c5c0b34b2ff97dd72e7d552e521c9cb77b100271", "pubkey": "1283255a355acd7b842028174e3a90dd18dbc75052854ccaae4dbd0d7d954eb4", "created_at": 1675301440, "kind": 1, "tags": [], "content": "helloworld!", "sig": "971948276b22c80fd8ae1b79e2a9a25fad3c29cd1c204c07e97d008fe6022ad0e19b17f02dd034bd6df8be8c6a4d8957edd7e2bab168885b64ca2073913a5e7f" }