Unable to Sign Transaction

[yogeshgautam]

I am using Mnemonic Wallet Provider in calibration node and while trying to sign transaction i could not sign the transation. Here is the things that i did to sign the transacton:

 const message = await walletProvider.createMessage({
                From: myAddress,
                To: 't17aadv3s2hi4gntz2vt7jluerrijogsugpqt5qai',
                GasLimit: 608335,
                GasFeeCap: new BigNumber(0),
                GasPremium: new BigNumber(0),
                Value: 0.001,
                Method: 0,
                Params: '',
                Nonce: 12
            });

            const signedMessage = await walletProvider.signMessage(message);

When the walletProvider.signMessage(message) method gets executed i am receiving error as Invalid Character.