public function postItem(string $dataset) : array
    {
        try {
            $entry = $this->di->get("request")->getBodyAsJson();
        } catch (\Anax\Request\Exception $e) {
            return [
                ["message" => "500. HTTP request body is not an object/array or valid JSON."],
                500
            ];
        }

        $item = $this->di->get("remserver")->addItem($dataset, $entry);
        return [$item];
    }