well actually you can , i found a solution to that .
You get current user with campaign , and then get posts on that campain id , include comments and users .
deserialize them to some json model and you will get them .
the only problem is that it seems to only get last two posts and last two comments on each post for some reason .
get the campaign , then for posts you have to do this call and choose to include whatever you want .
to get comments and users in the response .
lot of other combinations that worked with me after a long time of analyze .
Hope it helps .
P.S : dont forget to add the authorization header and paste the token there .