import { sendTransaction } from "thirdweb";
import { simulateHandleOp } from "thirdweb/extensions/erc4337";
 
const transaction = simulateHandleOp({
 contract,
 op: ...,
 target: ...,
 targetCallData: ...,
 overrides: {
   ...
 }
});
 
// Send the transaction
await sendTransaction({ transaction, account });