private function get_wp_api_payload( $resource, $resource_id, $event ) {
		switch ( $resource ) {
			case 'coupon':
			case 'customer':
			case 'order':
			case 'product':
				// Bulk and quick edit action hooks return a product object instead of an ID.
				if ( 'product' === $resource && 'updated' === $event && is_a( $resource_id, 'WC_Product' ) ) {
					$resource_id = $resource_id->get_id();
				}

				$version = str_replace( 'wp_api_', '', $this->get_api_version() );
				$payload = wc()->api->get_endpoint_data( "/wc/{$version}/{$resource}s/{$resource_id}" );
				break;

			// Custom topics include the first hook argument.
			case 'action':
				$payload = array(
					'action' => current( $this->get_hooks() ),
					'arg'    => $resource_id,
				);
				break;

			default:
				$payload = array();
				break;
		}

		return $payload;
	}