How to call rails create or net controller action from android

I'm trying to use the Spring RestTemplate postForObject method to call the create or new action in the controller for my model in my rails service. I was able to figure out how to do it going the other way when I'm calling the action that returns a list of existing instances (rows) in the rails database for this model type, but now that I'm trying to add a new instance to the database by accepting inputs through a layout and then use them to create an instance of the model type and submit it to the rails service using the RestTemplate from Spring by calling the postForObject method, nothing happens meaning no new row shows up in the database.