{ "walletKey": "<YOUR PRIVATE KEY>", "rpc": "<YOUR RPC>", "storageContract": "0x8997F152A1DA95Fc7f966bDdD64571c9ad11075e", "xftContract": "0x76BC677d444f1E9d57dAf5187ee2b7dC852745aE", "gasLimit": 1500000, "relayUrl": "http://relay.offshift.io" }