public HttpRequest bodyJson(final Object jsonObject) {
        final String jsonString = getJsonBody(jsonObject);
        Log.d("HTTP-JSON: attempt to send: " + jsonString);
        this.requestBodySupplier = () -> RequestBody.create(jsonString, MEDIA_TYPE_APPLICATION_JSON);
        return this;
    }
Sets body to Json parsed from given object
main/src/main/java/cgeo/geocaching/network/HttpRequest.java