dosomething_campaign_entity_property_info stub

gistfile1.php

/**
 * Implements hook_entity_property_info().
 */
function dosomething_campaign_entity_property_info() {
  $info = array();
  $properties = &$info['campaign']['properties'];
  $properties['id'] = array(
    'label' => t("Campaign ID"),
    'type' => 'integer',
    'description' => t("The unique campaign ID."),
    'schema field' => 'id',
  );
  $properties['created'] = array(
    'label' => t("Campaign ID"),
    'type' => 'integer',
    'description' => t("The unique campaign ID."),
    'schema field' => 'id',
  );
  return $info;
}