```\n    function _verifyRemoveSig(address fidOwner, bytes memory key, uint256 deadline, bytes memory sig) internal {\n        _verifySig(\n            _hashTypedDataV4(\n                keccak256(abi.encode(REMOVE_TYPEHASH, fidOwner, keccak256(key), _useNonce(fidOwner), deadline))\n            ),\n            fidOwner,\n            deadline,\n            sig\n        );\n    }\n```\n