npub1x4…4kcdp on Nostr: What is this?

{ "id": "b76950e21ced75ea3d13613e05703c5c61ee022be170c1aee7af797b0243656b", "pubkey": "35778bdbf64b5c7f8bc249b79627885b817ca26521fe80dc2aaa29556772c0dd", "created_at": 1726615148, "kind": 1, "tags": [], "content": "What is this?", "sig": "9d483343672e98255af0f39f010243d77f01716caf16560af424dbda41db0c48a36cf56f8574ecbedd6d90ed72a8655cfb282404aa0396988bedbca8982da99f" }