# File lib/fog/aws/requests/rds/create_event_subscription.rb, line 37
        def create_event_subscription(options={})
          response = Excon::Response.new
          name     = options.delete('SubscriptionName')
          arn      = options.delete('SnsTopicArn')

          if self.data[:event_subscriptions][name]
            raise Fog::AWS::RDS::IdentifierTaken.new("SubscriptionAlreadyExist => Subscription already exists")
          end

          subscription = {
            'CustSubscriptionId' => name,
            'EventCategories'    => options['EventCategories'] || [],
            'SourceType'         => options['SourceType'],
            'Enabled'            => options.fetch(:enabled, "true"),
            'Status'             => 'creating',
            'CreationTime'       => Time.now,
            'SnsTopicArn'        => arn,
          }

          self.data[:event_subscriptions][name] = subscription

          response.body = {
            "ResponseMetaData" => {"RequestId" => Fog::AWS::Mock.request_id},
            "CreateEventSubscriptionResult" => { "EventSubscription" => subscription }
          }
          response
        end