'Returns the instanceId from a Dell REST object.
:param blob: A Dell SC REST call\'s response.
:returns: The instanceId from the Dell SC object or None on error.'

def _get_id(self, blob):

    try:
        if isinstance(blob, dict):
            return blob.get('instanceId')
    except AttributeError:
        LOG.error('Invalid    API    object:    %s', blob)
    except TypeError as ex:
        LOG.error('Error    TypeError.    %s', ex)
    except scanner.JSONDecodeError as ex:
        LOG.error('Error    JSONDecodeError.    %s', ex)
    LOG.debug('_get_id    failed:    blob    %s', blob)
    return None
