diff --git a/lib/dunlop/ember/api_base_controller.rb b/lib/dunlop/ember/api_base_controller.rb
index 8d8b2ec..0116d84 100644
--- a/lib/dunlop/ember/api_base_controller.rb
+++ b/lib/dunlop/ember/api_base_controller.rb
@@ -211,6 +211,7 @@ module Dunlop::Ember::ApiBaseController
     end
     return resource.to_json if resource.is_a?(Hash)
     return resource if resource.is_a?(String)
+    return resource.to_json if resource.try(:custom_data?)
 
     action_serialize_options_method = :"#{action_name}_serialize_options"
     #action_serialize_options = respond_to?(action_serialize_options_method) ? __send__(action_serialize_options_method) : {}