Нужна подсказка, чтобы распарсить ответ сервера

#include "stdafx.h"
#include "iostream"
#include "string"
 
#define CURL_STATICLIB
#include "curl\curl.h"
#ifdef _DEBUG
#   pragma comment (lib, "curl/libcurl_a_Debug.lib")
#   pragma comment (lib, "curl/libssl_Debug.lib")
#   pragma comment (lib, "curl/libcrypto_Debug.lib")
#else
#   pragma comment (lib, "curl/libcurl_a_Release.lib")
#endif // DEBUG _DEBUG
 
static int writer(char *data, size_t size, size_t nmemb, std::string *writerData)
{
    if (writerData == NULL)
        return 0;
 
    writerData->append(data, size*nmemb);
 
    return size * nmemb;
}
 
 
int main()
{
    std::string content;
 
    //std::cout << "Some_Text";
 
    curl_global_init(CURL_GLOBAL_ALL);
    CURL *curl = nullptr;
    curl = curl_easy_init();
    curl_global_cleanup();
    if (curl)
    {
        curl_easy_setopt(curl, CURLOPT_URL, "http://127.0.0.1:5000/match/v1/driving/73.103130,49.817423;73.104353,49.817137;73.10824,49.81517?");
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &content);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
        CURLcode code = curl_easy_perform(curl);
        curl_easy_cleanup(curl);
    }
    //curl_global_cleanup();
    std::cout << content;
    std::cin.get()  ;
    return 0;
}

#include <iostream>
#include <string>
#include <iomanip>
#include <vector>
#include <exception>
#include <boost/property_tree/json_parser.hpp>
 
namespace bpt = boost::property_tree;
 
 
int main()
{
    try
    {
        bpt::ptree pt;
        bpt::read_json("in.json", pt);
        std::vector<double> vct;
        auto ptTracepoints = pt.get_child("tracepoints");
        for (auto ibt = ptTracepoints.begin(), iet = ptTracepoints.end(); ibt != iet; ++ibt)
        {
            auto ptLocation = ibt->second.get_child("location");
            for (auto ibl = ptLocation.begin(), iel = ptLocation.end(); ibl != iel; ++ibl)
            {
                vct.emplace_back(std::stod(ibl->second.data()));
            }
        }
 
        for (auto const& val : vct)
        {
            std::cout << std::setprecision(15) << std::setw(17) << std::left << val << std::endl;
        }
    }
    catch (std::exception const& exc)
    {
        std::cerr << exc.what() << std::endl; 
    }
}