[
  {
    "bytes": "32",
    "label": "balanceOf",
    "offset": 0,
    "slot": "0",
    "type": "mapping(address => uint256)"
  },
  {
    "bytes": "32",
    "label": "allowance",
    "offset": 0,
    "slot": "1",
    "type": "mapping(address => mapping(address => uint256))"
  }
]