    [
      {
          "mob": "minecraft:zombie",
          "persecond": 2,
          "attempts": 5,
          "amount": {
              "minimum": 1,
              "maximum": 2
          },
          "conditions": {
              "dimension": "minecraft:overworld",
              "norestrictions": false,
              "mindist": 20,
              "maxdist": 60,
              "maxthis": 60
          }
      }
    ]