How do I convert the c# code to c++?

I have a code in C# that I am finding it a bit difficult to convert to c++.
I have data formatted in a certain way in c# and want to be able to do the same with c++. Goal- Generate similar serialized data from c# in C++..

Dictionary<string, object> dict = new Dictionary<string, object>(); 
dict.Add("Time", "2015-11-21 21:34:34.881"); 
dict.Add("Risk", "Medium");    
Dictionary<string, object> msgpackOptions = new Dictionary<string, object>(); msgpackOptions.Add("TimeFormat", "DateTime");    
object[] item = new object[] { DateTime.UtcNow, dict };
object[] obj = new object[] { "TestName" , new object[] { item }, msgpackOptions };    //Using MessagePackSerializer class in c# to perform the serialization
byte[] message = MessagePackSerializer.Serialize(obj);
//writing to a pipe client(using PipeControl class in c#, not elaborated here, since I don't really need help with this, but just want to mention end goal of serilaizing using fluentd and writing to the pipe)                           
pipeClient.Write(message, 0, message.Length);

Here is what I have implemented, but I am confused about line 11 and which data structure would be best for this. Below is my code in c++, I am using msgpack library from https://www.nuget.org/packages/msgpack-c/ to send packets after serializing(which is done by msgpack::pack function)

typedef std::map<std::string, std::string> dicts; 
dicts dict; 
dict["Time"] = "2015-11-21 21:34:34.881"; 
dict["Risk"] = "Medium";                            
typedef std::map<std::string, dicts> dictionary; 
dictionary item;
item["2020"] = dict; //this "2020", should be the current datetime format...
typedef std::map<std::string, dictionary> final;
final obj; 
obj["TestName"]=item; 
msgpack::sbuffer buffer; 
msgpack::pack(buffer,obj);

If any more information is needed, happy to provide that incase I have missed out anything.Just need some guidance/tips as to what can I do here.Also, if there is a way to see the serialized data in c# that would be very helpful. Thanks :)