Vat

Event and Function Description for the Vat Contract:

event Created(
    address indexed sender,
    address indexed owner,
    address proxy,
    address cache
);
sender：User address
owner：Proxy owner address
proxy：User proxy contract address
cache：Cache contract address

The function signature for frob is bytes4 (keccak256("frob(bytes32,address,address,address,int256,int256)").