GTM datalayer payload

66.102.8.47 - - [01/Jun/2018:13:03:23 +0200] 66.102.8.47 - - [01/Jun/201 "GET /ws/?dl=%5B%7B%22gtm.start%22%3A1527850999722%2C%22event%22%3A%22gtm.js%22%2C%22gtm.uniqueEventId%22%3A0%7D%2C%7B%22ecommerce%22%3A%7B%22purchase%22%3A%7B%22actionField%22%3A%7B%22id%22%3A%22T12345%22%2C%22revenue%22%3A%2235.43%22%2C%22tax%22%3A%224.90%22%2C%22shipping%22%3A%225.99%22%2C%22coupon%22%3A%22SUMMER_SALE%22%7D%2C%22products%22%3A%5B%7B%7D%5D%7D%7D%2C%22eventCategory%22%3A%22ECOMMERCE%22%2C%22eventAction%22%3A%22TRANSACTION%22%2C%22eventLabel%22%3A%22MOBILE%22%2C%22event%22%3A%22purchase%22%2C%22gtm.uniqueEventId%22%3A29%7D%2C%7B%22ecommerce%22%3A%7B%22purchase%22%3A%7B%22actionField%22%3A%7B%22id%22%3A%22T12345%22%2C%22revenue%22%3A%2235.43%22%2C%22tax%22%3A%224.90%22%2C%22shipping%22%3A%225.99%22%2C%22coupon%22%3A%22SUMMER_SALE%22%7D%2C%22products%22%3A%5B%7B%7D%5D%7D%7D%2C%22eventCategory%22%3A%22ECOMMERCE%22%2C%22eventAction%22%3A%22TRANSACTION%22%2C%22eventLabel%22%3A%22MOBILE%22%2C%22event%22%3A%22purchase%22%7D%5D HTTP/1.0" 200 594 "https://gtm-msr.appspot.com/render2?id=GTM-WTFBBQ" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko"