[
  {
    "id": 1,
    "waves": [
      { "enemies": [{ "type": "ChaseEnemy", "count": 5 }] },
      { "enemies": [{ "type": "ChaseEnemy", "count": 4 }, { "type": "SwarmerEnemy", "count": 6 }] },
      { "enemies": [{ "type": "ChaseEnemy", "count": 3 }, { "type": "ShooterEnemy", "count": 2 }] }
    ]
  },
  {
    "id": 2,
    "waves": [
      { "enemies": [{ "type": "ChaseEnemy", "count": 7 }, { "type": "SwarmerEnemy", "count": 8 }] },
      { "enemies": [{ "type": "ShooterEnemy", "count": 4 }, { "type": "SwarmerEnemy", "count": 10 }] },
      { "enemies": [{ "type": "ChaseEnemy", "count": 5 }, { "type": "ShooterEnemy", "count": 3 }] },
      { "enemies": [{ "type": "ChaseEnemy", "count": 6 }, { "type": "ShooterEnemy", "count": 4 }, { "type": "SwarmerEnemy", "count": 10 }] }
    ]
  }
]