LRENZ

WITH
  events AS (
  SELECT
    TIMESTAMP_MICROS(event_timestamp) AS event_ts,
    CONCAT(user_pseudo_id,'-',event_name,'-',CAST(event_timestamp AS STRING)) AS event_id,
    user_pseudo_id AS user_pseudo_id,
    user_id,
    traffic_source.name AS utm_channel,
    traffic_source.medium AS utm_medium,
    traffic_source.source AS utm_source,

LRENZ

<script id="gtm-modern-cookie-replicator">
  /**
   * Modern UTM & Referral Cookie Replicator
   *
   * Inspired from the UTMZ cookie replicator, 
   * whose goal was to makes a generally faithful representation 
   * of the old __utmz cookie from Classic Analytics. ;
   *
   * the "Modern" cookie replicator
   * - stores and decodes the cookie as/from JSON format