import { buildClient } from '@datocms/cma-client-node';
async function run() {
  const client = buildClient({ apiToken: '<YOUR_API_TOKEN>' });
  
  const modelIdOrApiKey = 'blog_post';
  
  const fieldset = await client.fieldsets.create(modelIdOrApiKey, {
    title: 'SEO-related fields'
  });
  
  console.log(fieldset);
}
run();