How to create draft entry with strapi v4?

Finally, I use this script and it works well.

'use strict';

/**
 * foo controller
 */

const { createCoreController } = require('@strapi/strapi').factories;

module.exports = createCoreController('api::foo.foo', ({ strapi }) => ({
  async create(ctx) {
    const user = ctx.state.user; // if need
    const { body } = ctx.request;

    const newFoo = await strapi.entityService.create('api::foo.foo', {
      data: body.data
    });

    return newFoo;
  },
}));

In request, without publishedAt key, I can create a Draft Content.
This is partial example with Ruby.

options[:body] = {
  data: {
    title: 'test',
    publishedAt: DateTime.now.iso8601, # comment out to create Draft
  }
}