How to POST raw whole JSON in the body of a Retrofit request?

Question

This question may have been asked before but no it was not definitively answered. How exactly does one post raw whole JSON inside the body of a Retrofit request?

See

Answer 1

Based on the top answer, I have a solution to not have to make POJOs for every request.

Example, I want to post this JSON.

{
    "data" : {
        "mobile" : "qwer",
        "password" : "qwer"
    },
    "commom" : {}
}

then, I create a common class like this:

import java.util.Map;
import java.util.HashMap;

public class WRequest {

    Map data;
    Map common;

    public WRequest() {
        data = new HashMap<>();
        common = new HashMap<>();
    }
}

Finally, when I need a json

WRequest request = new WRequest();
request.data.put("type", type);
request.data.put("page", page);

The request marked annotation @Body then can pass to Retrofit.