potentialspawn.json
[
    {
        "dimension": 0,
        "mobs":
        [
            {
                "mob": "customnpcs:npchumanmale",
                "weight": 5,
                "groupcountmin": 1,
                "groupcountmax": 3
            }
        ]
    }
]
spawn.json
[
	{
		"mob": "customnpcs:npchumanmale",
		"maxcount": 8,
		"result": allow
	}
]