import Courier from '@trycourier/courier';

const client = new Courier({
  apiKey: process.env['COURIER_API_KEY'], // This is the default and can be omitted
});

const notificationContentMutationResponse = await client.journeys.templates.putLocale('x', {
  templateId: 'x',
  notificationId: 'x',
  elements: [
    { id: 'elem_1', content: 'Hola {{data.name}}.' },
    { id: 'elem_2', title: 'Bienvenido!' },
  ],
  state: 'DRAFT',
});

console.log(notificationContentMutationResponse.id);

{
  "id": "nt_01abc123",
  "version": "2022-01-01",
  "elements": [
    {
      "id": "elem_1",
      "checksum": "abc123"
    },
    {
      "id": "elem_2",
      "checksum": "def456"
    }
  ],
  "state": "DRAFT"
}