'; $app_secret = ''; $app_id = ''; $id = ''; $api = Api::init($app_id, $app_secret, $access_token); $api->setLogger(new CurlLogger()); $fields = array( ); $params = array( 'creative' => array('object_story_spec' => array('link_data' => array('call_to_action' => array('type' => 'USE_APP','value' => array('link' => '')),'description' => 'Description','link' => '','message' => 'Message','name' => 'Name','picture' => ''),'page_id' => '')), 'ad_format' => 'MOBILE_FEED_STANDARD', ); echo json_encode((new AdAccount($id))->getGeneratePreviews( $fields, $params )->getResponse()->getContent(), JSON_PRETTY_PRINT);