code: private void updateLimitFacebookTracking() {
          JSONObject updateJson = getBranchRemoteAPIVersion() == BRANCH_API_VERSION.V1 ? params_ : params_.optJSONObject(Defines.Jsonkey.UserData.getKey());
          if (updateJson != null) {
              boolean isLimitFacebookTracking = prefHelper_.isAppTrackingLimited(); // Currently only FB app tracking
              if (isLimitFacebookTracking) {
                  try {
                      updateJson.putOpt(Defines.Jsonkey.limitFacebookTracking.getKey(), isLimitFacebookTracking);
                  } catch (JSONException ignore) {
                  }
              }
          }
      }
docs: /*
  Update the the limit app tracking value to the request