[
  {
    "type": "function",
    "name": "onERC721Received",
    "inputs": [
      {
        "name": "operator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "from",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "data",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bytes4",
        "internalType": "bytes4"
      }
    ],
    "stateMutability": "nonpayable"
  }
]