How should I pass json data in the request payload of http post request

Use the request module

npm install -S request

var request = require('request')

var postData = {
  name: 'test',
  value: 'test'
}

var url="https://www.example.com"
var options = {
  method: 'post',
  body: postData,
  json: true,
  url: url
}
request(options, function (err, res, body) {
  if (err) {
    console.error('error posting json: ', err)
    throw err
  }
  var headers = res.headers
  var statusCode = res.statusCode
  console.log('headers: ', headers)
  console.log('statusCode: ', statusCode)
  console.log('body: ', body)
})