curl --request POST \
  --url https://api.sendx.io/api/v1/rest/send/template \
  --header 'Content-Type: application/json' \
  --header 'X-Team-ApiKey: <api-key>' \
  --data '{
  "from": {
    "email": "from@example.com",
    "name": "From Name"
  },
  "to": [
    {
      "email": "to@example.com",
      "name": "To Name",
      "customFields": {}
    }
  ],
  "replyTo": {
    "email": "reply@example.com",
    "name": "Reply Name"
  },
  "subject": "Your Subject Here",
  "template": "template_f3lJvTEhSjKGVb5Lwc5SWS"
}'

[
  {
    "to": "jsmith@example.com",
    "submittedAt": 123,
    "errorCode": 123,
    "message": "<string>"
  }
]