Подписанные данные
{"protocol_number":{"label":"\u2116 \u0434\u043e\u0433\u043e\u0432\u043e\u0440\u0430","value":"3"},"date_publication":{"label":"\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438","value":{"current":"00.00.0000 00:00"}},"contract_info_protocol_141591_contractor_source":{"label":"\u0420\u0435\u0448\u0435\u043d\u0438\u0435"}}