{
  "abi": [
    {
      "constant": true,
      "inputs": [
        {
          "internalType": "bytes32",
          "name": "_hash",
          "type": "bytes32"
        },
        {
          "internalType": "bytes",
          "name": "_signature",
          "type": "bytes"
        }
      ],
      "name": "isValidSignature",
      "outputs": [
        {
          "internalType": "bytes4",
          "name": "",
          "type": "bytes4"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
  ]
}