gistfile1.rb

def subscription_state_change
  begin
    account = Account.find(@subscription.customer.reference)
    account.subscription_state = @subscription.state
    account.subscription_billing_date = @subscription.current_period_ends_at
    account.save(:validate => false)
    render :nothing => true, :status => 200
  rescue Exception => e
    notify_hoptoad(e) #If you use hoptoad...
    render :nothing => true, :status => 422 and return
  end
end