duck on Nostr: what is zap ?

{ "id": "8f6f6cc3fe5ba597fd4540578ca54e534a6d819f80f5629a485ac0ba0c987c2b", "pubkey": "ee527d6cadba47bdf48142c530ce02ab25275db285699e805f2865883d5705e0", "created_at": 1724789812, "kind": 1, "tags": [ [ "e", "73983c700e87e12b6938a82cf7431a1f988efc179a57b424c975b07b4c8977b2", "wss://offchain.pub", "root" ], [ "p", "1bd32a386a7be6f688b3dc7c480efc21cd946b43eac14ba4ba7834ac77a23e69" ] ], "content": "what is zap ?", "sig": "0e97b64eb1caf7055e3ead518b49596222d9a4661753666e0f21eb5a2da0671c5bcd4eab6d3f4c131cda387e36e4051ce2704fea89d3a0e11dbfcea17f7a78af" }