c# how to work with json get request?

Question

Computer networks

I work with vk api, when you click on the button, the following code is executed:

using (var request = new HttpRequest())
            {
                var urlParams = new RequestParams();

                string response = request.Get("https://api.vk.com/method/messages.getLastActivity?user_id=id&v=5.52&access_token=tokenc").ToString();

                string content = response.ToString();
                dynamic json = JObject.Parse(content);
            }

I get a response in the form:

"{\"response\":{\"online\":0,\"time\":1595229881}}"

Next, I form it into normal json and
get:

{{
  "response": {
    "online": 0,
    "time": 1595229881
  }
}}

It would seem that the song is sung on this, but in this language with json it’s not so simple, it turns out that it needs to be serialized, I tried many options, serialization and finally got confused.
How can you simply take the online or time parameter for example?

The library was used by Newtonsoft.Json

Answer 1

They returned normal correct JSON to you, and you broke it.

Then I form it into normal json and
get:
{{
"response": {
"online": 0,
"time": 1595229881
}
}}

You're generating JSON incorrectly. {{ and }} should not be. Replace with { and }
And on this the song will be sung.
Change the difficulty of the question to EASY