subscribe-deposit-event.js

const WebSocket = require('ws')

const ws = new WebSocket('wss://ws-mumbai.matic.today/')

ws.on('open', function open() {
  ws.send('{"id": 1, "method": "eth_subscribe", "params": ["newDeposits", {}]}')
})

ws.on('message', function incoming(data) {
  console.log(data)
})

ws.on('close', function close() {
  console.log('closing websocket connection...')
})