marketing-cloud-ssjs-rest-api-access.js

<script runat=server>
  Platform.Load("core", "1.1.1");

  var accessToken = {{yourToken}};
  var url = 'https://www.exacttargetapis.com/asset/v1/content/assets/{{ContentID}}'

  var payload = '{{yourPayload}}';

  var auth = 'Bearer ' + accessToken;

  var req = new Script.Util.HttpRequest(url);
  req.emptyContentHandling = 0;
  req.retries = 2;
  req.continueOnError = true;
  req.contentType = "application/json"
  req.setHeader("Authorization", auth);
  req.method = "PUT"; /*** You can change the method here ***/
  req.postData = payload;

  var resp = req.send();
</script>