public function insertTypelessEntity(array $entries, $options = null)
    {
        $entity = new Entity();
        $entity->setPartitionKey($this->_defaultParitionKey);
        $entity->setRowKey(uniqid());

        foreach ($entries as $columnName => $value) {
            $entity->addProperty($columnName, null, $value);
        }

        $this->_proxy->insertEntity($this->_name, $entity, $options);
    }