“$$PLACEHOLDER$$”: “valor”curl --location --request POST 'https://gateway.certisend.com/v2/email/send' \
--header 'Content-Type: application/json' \
--data-raw '{
"interface_id": 0,
"destination": "string",
"fields": {
"$$PLACEHOLDER$$": "string"
},
"attachments": [
{
"filename": "string",
"data": "string"
}
]
}'{
"success": true,
"shipment_id": 0,
"campaign_id": 0
}