json data signing and verification in node.js

signing.js

const crypto = require('crypto');
const buffer = require('buffer');
const algorithm =   "SHA256"
// Create a private key
const { privateKey,publicKey } = crypto.generateKeyPairSync('rsa', {
  modulusLength: 2048,
});
  
// JSON object
const person = {
    name: "Siv S",
    email:"[email protected]",
    address: "Dubai"
}
  
// Convert Stringified json data to buffer  
const data = Buffer.from( JSON.stringify(person) );
  
// Sign the data and returned signature in buffer 
const sign = crypto.sign(algorithm, data , privateKey);
  
// Convert returned buffer to base64
const signature = sign.toString('base64');
  
// Printing the signature 
console.log(`Signature:\n\n ${signature}`);


// Verifying signature using crypto.verify() function
const isVerified = crypto.verify(
	algorithm,
	data,
	publicKey,
	Buffer.from(signature,'base64')
);
 
// Printing the result
console.log(`Is signature verified: ${isVerified}`);