private ObjectNode makeRequest(final String api) {
        ObjectNode req = JSON.objectNode();
        req.put("api", api);
        return req;
    }
private ObjectNode makeRequest ( final String api ) { ObjectNode req = JSON . objectNode ( ) ; req . put ( "api" , api ) ; return req ; }
Returns a request object for a specific API call.
@param api The api call (i.e "create", "del", "load", ....)
@return A JSON object