create.js

var request = require("request");

var options = { method: 'POST',
  url: 'https://api.storyblok.com/v1/spaces/YOUR_SPACE_ID/stories',
  headers: 
   { Authorization: 'YOUR_AUTH_TOKEN',
     'Content-Type': 'application/json',
     Accept: 'application/json' },
  body: { story: 
      { name: 'Story 1',
        content: {
          //... your content json
      },
      slug: 'demo' } 
   },
  json: true };
  

request(options, function (error, response, body) {
  if (error) throw new Error(error);

  console.log(body);
});