How to use the algosdk.signLogicSigTransaction function in algosdk

//create a transaction
    let txn = {
        "from": recoveredAccount.addr,
        "to": "SOEI4UA72A7ZL5P25GNISSVWW724YABSGZ7GHW5ERV4QKK2XSXLXGXPG5Y",
        "fee": params.fee,
        "amount": 100000,
        "firstRound": params.firstRound,
        "lastRound": params.lastRound,
        "genesisID": params.genesisID,
        "genesisHash": params.genesisHash,
    };


    let rawSignedTxn = algosdk.signLogicSigTransaction(txn, lsig);

    //Submit the lsig signed transaction
    let tx = await algodclient.sendRawTransaction(rawSignedTxn.blob).do();
    console.log("Transaction : " + tx.txId);

})().catch(e => {
    console.log(e);