How can I append custom message to transaction?

[OlegShalagin]

I wanted to send some data with transaction and check it on server.
Need help.

const defaultTx = {
        validUntil: Date.now() + 1000000,
        messages: [
            {
                address: '0:0####',
                amount: '20000000',
                payload: 'causes error',
                stateInit: 'causes error'
            }
        ],
        message: 'message ? does not appear'
    };

const result = await connector.sendTransaction(defaultTx);