CRM merge template API-name

CRM merge template API-name

I am trying to send mail merge, but i get INVALID_DATA:

params = {"send_mail_merge":[{"mail_merge_template":{"name":"Angebot Kreuzfahrt"},"to_address":[{"type":"email","value":"receiver@gmail.com"}],"subject":"Your Subject","message":"Your message"}]};
response = invokeurl
[
type :POST
parameters:params.toString()
connection:"crmoauth"
];


response:
  • {"send_mail_merge":[{"code":"INVALID_DATA","details":{"api_name":"id","json_path":"$.send_mail_merge[0].mail_merge_template.id"},"message":"the value given is invalid","status":"error"}]}

I checked the API-name with:

response = invokeurl
[
type :GET
connection:"crmoauth"
];

response:

{
  "email_templates": [
    {
      "created_time": "2023-07-20T09:50:44+02:00",
      "attachments": null,
      "subject": "Angebot: ${!Deals.Deal_Name}",
      "module": {
        "api_name": "Deals",
        "id": "6041170000001234567"
      },
      "active": true,
      "last_version_statistics": {
        "tracked": 0,
        "delivered": 0,
        "opened": 0,
        "bounced": 0,
        "sent": 0,
        "clicked": 0
      },
      "created_by": {
        "name": "RandomUser987",
        "id": "6041170000001234567"
      },
      "modified_time": "2023-07-20T10:12:50+02:00",
      "folder": {
        "name": "Öffentliche Email-Vorlagen",
        "id": "6041170000001234567"
      },
      "last_usage_time": null,
      "associated": false,
      "name": "Angebot Kreuzfahrt",
      "consent_linked": false,
      "modified_by": {
        "name": "RandomUser123",
        "id": "987654321"
      },
      "id": "6041170000001234567",
      "editor_mode": "gallery",
      "category": "normal",
      "favorite": false
    }
  ],
  "info": {
    "per_page": 200,
    "count": 1,
    "page": 1,
    "more_records": false
  }
}