sent_at es fecha de envío.seen_at es fecha de lectura.clicked_at es fecha de clickeado de link, si aplicara.curl --location --request GET 'https://gateway.certisend.com/v2/email/data/'{
"success": true,
"id": 0,
"campaign_id": 0,
"shipment_type": 0,
"status": 0,
"destination": "string",
"field_contents": {
"$$PLACEHOLDER$$": "string"
},
"sent_at": "2019-08-24T14:15:22.123Z",
"seen_at": "2019-08-24T14:15:22.123Z",
"clicked_at": "2019-08-24T14:15:22.123Z"
}