[
  {
    "mob": "minecraft:zombie",
    "persecond": 0.5,
    "attempts": 20,
    "amount": {
      "minimum": 2,
      "maximum": 5
    },
    "conditions": {
      "dimension": "minecraft:overworld",
      "norestrictions": true,
      "mindist": 25,
      "maxdist": 100,
      "minheight": 15,
      "maxheight": 200,
      "maxthis": 200
    }
  }
]