[2018-03-24 11:08:14.364] [ERROR] ipcProviderBackend - Send request failed { code: -32602,
  message: 'invalid argument 0: json: cannot unmarshal non-string into Go value of type common.Hash' }

function testContract(string title,string _description,
                           address _contractAddressOfAsset,
                           string _recordIdOfAsset,
                           uint _deadline,
                           uint _startingPrice,
                           uint _reservePrice,
                           uint _distributionCut,
                           address _distributionCutAddress) public returns (bool k) {


        test=title;
        return true;
    }

Geth
Version: 1.7.3-stable
Git Commit: 4bb3c89d44e372e6a9ab85a8be0c9345265c763a
Architecture: amd64
Protocol Versions: [63 62]
Network Id: 1
Go Version: go1.9
Operating System: linux
GOPATH=
GOROOT=/usr/lib/go-1.9