Hey im trying to add the bradley apc for players to buy and blow up in my shop using the below config but its not working for me, or regular players, what am i doing wrong?

"Spawn Bradley": {
"buy": "5000",
"img": "https://cdn.iconscout.com/icon/free/png-256/tank-161-897781.png",
"cmd": ["entity.spawn bradleyapc", "say $player.name bought a personal Bradley."],
"cooldown": "0",
"sell": "0"

Thanks