code: def download_options(dataset, node, entityids, api_key=None):
      
  
      payload = {
          "apiKey": api_key,
          "datasetName": dataset,
          "node": node,
          "entityIds": entityids
      }
  
      return json.dumps(payload)
docs: The use of the download options request is to discover the different download
      options for each scene. Some download options may exist but still be unavailable
      due to disk usage and many other factors. If a download is unavailable
      it may need to be ordered.
      
      :param dataset:
      
      :param node:
      
      :param entityIds:
      
      :param api_key:
          API key is not required.