Changes to List creator's tracking links

added the required property data/items/earnings/firstPaymentGross to the response with the 200 status

added the required property data/items/earnings/otherSpendGross to the response with the 200 status

added the required property data/items/earnings/renewalGross to the response with the 200 status

added the required property data/items/engagement/newSubscribers to the response with the 200 status

added the required property data/items/engagement/paidSubscribers to the response with the 200 status

added the required property data/items/engagement/returningSubscribers to the response with the 200 status

added the required property data/items/engagement/trialStarts to the response with the 200 status