code: def content_upload(self, key, model, contentid, data, mimetype):
          
          headers = {"Content-Type": mimetype}
          path = PROVISION_MANAGE_CONTENT + model + '/' + contentid
          return self._request(path, key, data, 'POST', self._manage_by_cik, headers)
docs: Store the given data as a result of a query for content id given the model.
  
          This method maps to
          https://github.com/exosite/docs/tree/master/provision#post---upload-content
  
          Args:
              key: The CIK or Token for the device
              model:
              contentid: The ID used to name the entity bucket
              data: The data blob to save
              mimetype: The Content-Type to use when serving the blob later