Return JSON response from 404

app/controllers/api/v1/base_controller.rb

@@ -1,6 +1,8 @@
 module Api
   module V1
     class BaseController < ActionController::API
+      rescue_from ActiveRecord::RecordNotFound, with: :not_found_error
+
       private
 
       def authenticate
@@ -8,6 +10,12 @@ module Api
         head :unauthorized unless ip_allowed
       end
 
+      def not_found_error
+        uuid = params['uuid']
+        json = { error: 'Not Found', uuid: uuid, message: 'Record not found' }
+        render json: json, status: :not_found
+      end
+
       def allowed_ips
         ENV['auction_api_allowed_ips'].split(',').map(&:strip)
       end