The following is from a test file in tonweb. Here's the entire file. https://github.com/toncenter/tonweb/blob/master/src/test-jetton.js

It should be enough for your needs!

    const transfer = async () => {
        const seqno = (await wallet.methods.seqno().call()) || 0;
        console.log({seqno})

        console.log(
            await wallet.methods.transfer({
                secretKey: keyPair.secretKey,
                toAddress: JETTON_WALLET_ADDRESS,
                amount: TonWeb.utils.toNano('0.05'),
                seqno: seqno,
                payload: await jettonWallet.createTransferBody({
                    jettonAmount: TonWeb.utils.toNano('500'),
                    toAddress: new TonWeb.utils.Address(WALLET2_ADDRESS),
                    forwardAmount: TonWeb.utils.toNano('0.01'),
                    forwardPayload: new TextEncoder().encode('gift'),
                    responseAddress: walletAddress
                }),
                sendMode: 3,
            }).send()
        );
    }