Custom rule event trigger, action

function recurly_account_save () {
..............
rules_invoke_event('recurly_account_save',$recurly_account);
}
 
/* define event trigger */ 
function modulename_rules_event_info() {
  return array(
    'recurly_account_save' => array(
      'label' => t('update role'),
      'variables' => array(
        'user' => array(
          'type' => 'array',  // can be define as text, array, user , integer ....
          'label' => t('user'),
        ),
      ),
    ),
  );
}
 
/* define action */ 
function modulename_rules_action_info() {
    $actions['modulename_getresult'] = array(
      'label' => t('update role'),
      'parameter' => array(
        'user' => array(
          'type' => 'array',
          'label' => t('user'),
        ),
      ),
    );
   return $actions;
}
 
function modulename_getresult($account) {
  //$account is the variable passed in from event trigger
 //do your logic here
}