Gist showing how easy it is to use biconomy meta transaction. No need to change existing way of calling your functions

meta-transaction.js

let bookReads = new web3.eth.Contract(abi, address);

bookReads.methods.addToFav(bookId).send({from: userAddress}).on("transactionHash", (hash) => {
    // Get Transaction Hash
}).once("confirmation", (confirmationCount, receipt) => {
    // Get Transaction Confirmation
}).on("error", (error)=>{
    // Error During Transaction
});