use individual json/urlencoded middlewares

Sure, I understand your question. To use individual JSON or URL encoded middlewares in a Node.js application, you can use the built-in middleware functions provided by the Express framework.

To use JSON middleware, you can use the `express.json()` function which parses incoming requests with JSON payloads. You can add this middleware to your application like this:

const express = require('express');
const app = express();

app.use(express.json());

To use URL encoded middleware, you can use the `express.urlencoded()` function which parses incoming requests with URL encoded payloads. You can add this middleware to your application like this:

const express = require('express');
const app = express();

app.use(express.urlencoded({ extended: true }));

You can also use these middlewares individually for specific routes by adding them as middleware functions to those routes.

I hope this helps! Let me know if you have any more questions.