Подписанные данные
{"lot_document_title":{"label":"\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u0444\u0430\u0439\u043b\u0430","value":"\u0424\u043e\u0442\u043e 4"},"lot_document_file":{"label":"\u0424\u0430\u0439\u043b","value":{"name":"\u041a\u0435\u0434\u0440-2.jpg","type":"image\/jpeg","tmp_name":"\/tmp\/0039240019","md5sum":"d0073ccc014b4c4c3824c2543fc4db7d","size":"2138972"}},"lot_document_description":{"label":"\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0444\u0430\u0439\u043b\u0430","value":""}}