Nullifier on Nostr: Point of sale?

{ "id": "36ac09a08c6c2498753b164453932b2d3381f65e0146defee7bbbcafec2624e7", "pubkey": "5ab4519d7f01ba659ddb1b7284ad129b01c484c1ec2bf69335be9241f3643f8f", "created_at": 1682812642, "kind": 1, "tags": [ [ "e", "4c7ddd5afc7b38fc9d63f60c284aa7a2ad3b02b0119e4eb8d0e776c74a8d361a" ], [ "p", "cb5a5f84f511e5c8039210f3887272ea8d806e5f7f5b26cb443f3b6ec8b15664" ] ], "content": "Point of sale?", "sig": "eac006e4f01b0d5c533c0aa2920611e591d892c76559983f3067ff97e9bd422a79b40e3636a253dccd7525dbdc7e7e199e0954264bc285ac66cc655e08831674" }