@RequestParam(value="callback", required=false) String aCallback
) {
try {
JsonParamsHolder p = new JsonParamsHolder(aParams);
String myEmail = p.getString("email");
Map<String,Object> myAttributesMap = p.getProps("props", null);
String myMessageGroupName = p.getString("message_group_name");
Subscriber mySubscriber =
subscriberService.subscribe(myEmail, myAttributesMap, myMessageGroupName);
return webApiUtil.jsonRpcResult(aId, aCallback, PropUtil.getInstance().mkprops("jr_subscriber_id", mySubscriber.getId()));