drupal 7, change entity paths.

gistfile1.txt

/**
 * Implements hook_entity_info_alter().
 */
function cba_events_entity_info_alter(&$entity_info) {
  // Update exam events path.
  $entity_info['event']['bundles']['exam_event']['crud']['edit']['path'] = 'event/exam/%eckentity/edit';
  $entity_info['event']['bundles']['exam_event']['crud']['delete']['path'] = 'event/exam/%eckentity/delete';

  // Update default event path.
  $entity_info['event']['bundles']['default']['crud']['add']['path'] = 'event/default/add';
  $entity_info['event']['bundles']['default']['crud']['edit']['path'] = 'event/default/%eckentity/edit';
  $entity_info['event']['bundles']['default']['crud']['delete']['path'] = 'event/default/%eckentity/delete';
}