I am using https://github.com/gnosis/ethers-multisend to encode batch transactions into Meta transactions. And following https://docs.gnosis-safe.io/tutorials/tutorial_tx_service_initiate_sign to send my encoded transaction to gnosis. The transactions get encoded but I get the following error. Can anyone help me how to submit transactions to gnosis transaction service? 
Following is the code snippet that I am using
import { encodeMulti, encodeSingle, MetaTransaction } from 'ethers-multisend' const [transactions, setTransactions] = useState<MetaTransaction[]>([]) const addToBatch = () => { const encodedTx = encodeSingle({ type: TransactionType.transferFunds, id: '1', token: tokenAddress, to: recipientAddress, amount: ethers.utils.parseUnits(fundAmount, decimals).toString(), decimals: decimals, }) if(!transactions) { setTransactions([encodedTx]) } else { console.log('transactions', transactions) setTransactions([...transactions, encodedTx]) } const executeTransaction = () => { const encodedMultiTransactions = encodeMulti(transactions) submitTx(accountData?.address, accountData?.address, PRIVATE_KEY, encodedMultiTransactions) } const submitTx = async(safe, sender, privateKey, tx) => { const safeDomain = new EIP712Domain({ verifyingContract: safe, }) const SafeTx = safeDomain.createType('SafeTx', [ { type: 'address', name: 'to' }, { type: 'uint256', name: 'value' }, { type: 'bytes', name: 'data' }, { type: 'uint8', name: 'operation' }, { type: 'uint256', name: 'safeTxGas' }, { type: 'uint256', name: 'baseGas' }, { type: 'uint256', name: 'gasPrice' }, { type: 'address', name: 'gasToken' }, { type: 'address', name: 'refundReceiver' }, { type: 'uint256', name: 'nonce' }, ]) tx['operation'] = 1 const baseTxn = tx console.log(JSON.stringify({ baseTxn })) // Let the Safe service estimate the tx and retrieve the nonce const { safeTxGas, lastUsedNonce } = await gnosisEstimateTransaction( safe, baseTxn, ) const txn = { ...baseTxn, safeTxGas, // Here we can also set any custom nonce nonce: lastUsedNonce === undefined ? 0 : lastUsedNonce + 1, // We don't want to use the refund logic of the safe to lets use the default values baseGas: 0, gasPrice: 0, gasToken: '0x0000000000000000000000000000000000000000', refundReceiver: '0x0000000000000000000000000000000000000000', } console.log({ txn }) const safeTx = new SafeTx({ ...txn, data: utils.arrayify(txn.data) }) const signer = async data => { const { r, s, v } = ethUtil.ecsign(data, ethUtil.toBuffer(privateKey)) return ethUtil.toRpcSig(v, r, s) } const signature = await safeTx.sign(signer) console.log({ signature }) const toSend = { ...txn, sender, contractTransactionHash: '0x' + safeTx.signHash().toString('hex'), signature: signature, } console.log(JSON.stringify({ toSend })) const { data } = await gnosisProposeTx(safe, toSend) console.log({ data }) console.log('Done?') } "data":"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" safe: "0x7723d6CD277F0670fcB84eA8E9Efe14f1b16acBB" 
