We have successfully implemented Gmail Annotations for our emails. However, with Black Friday around the corner, we wanted to utilize multiple images with Catalog Cards. I found the reference guide that calls out the Item Properties and such, but I have no idea how to code this into JSON-LD. I use 250ok/Validity's script as a base, which is below. Can someone help me code or provide sample code for the Catalog Card annotation?
<script type="application/ld+json">
[{
"@context": "http://schema.org/",
"@type": "Organization",
"logo": "http://250ok.com/img/favicon-black.png"
},{
"@context": "http://schema.org/",
"@type": "EmailMessage",
"subjectLine": "Time to renew your 250ok Account"
},{
"@context": "http://schema.org/",
"@type": "DiscountOffer",
"description": "10% off",
"discountCode": "RENEW2019",
"availabilityStarts": "2020-11-06T08:00:00-07:00",
"availabilityEnds": "2020-11-25T08:00:00-07:00"
},{
"@context": "http://schema.org/",
"@type": "PromotionCard",
"image": "https://s3.amazonaws.com/250ok-wordpress/wp-content/uploads/2018/12/03212604/promo_sample.png"
}]
</script>