Create content entry with default locale

Hi guys,

I’m using the Content Management API to manage my Contentful entries. Currently, everytime I create an entry I have to pass in locale en-US as below:

environment.createEntry(contentType, {
        fields: {
          id: {
            "en-US": id,
          name: {
            "en-US": name,

Just wonder is there a way that I can create a Contentful entry without pass in locale.