how to use WebRequest to post JSON data

[martin-sun]

import * as WebRequest from 'web-request';

(async function () {
var data = {
"id": 5,
"title": "json-server5",
"author": "typicode5"
};
await WebRequest.post('http://192.168.22.10:3000/posts', {headers: {'Content-Type': 'application/json'}}, data);
})();

I try to use WebRequest post JSON data with above code.
but always get fatal error:

(node:45899) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: Argument error, options.body.
_http_outgoing.js:456
throw new TypeError('First argument must be a string or Buffer');
^

TypeError: First argument must be a string or Buffer
at ClientRequest.OutgoingMessage.write (_http_outgoing.js:456:11)
at Request.write (/Users/martinsun/node_modules/request/request.js:1514:27)
at end (/Users/martinsun/node_modules/request/request.js:552:18)
at Immediate. (/Users/martinsun/node_modules/request/request.js:581:7)
at runCallback (timers.js:637:20)
at tryOnImmediate (timers.js:610:5)
at processImmediate [as _immediateCallback] (timers.js:582:5)

Would you please let me know how to fix the problem?

[martin-sun]

I just check the README.md and notice the command should add typings/node/node.d.ts
tsc index.ts typings/node/node.d.ts --target es6 --module commonjs

when I run above command, I will get below error.
error TS6053: File 'typings/node/node.d.ts' not found.