curl --request POST \
  --url https://api.dintero.com/v1/accounts/{aid}/management/settings/connections/mastercard-3ds \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "signup": {
    "case_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}
'

{
  "signups": [
    {
      "case_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "created_at": "2023-11-07T05:31:56Z"
    }
  ],
  "configuration": {
    "status": "enabled"
  },
  "events": [
    {
      "created_at": "2023-11-07T05:31:56Z",
      "status": "pending",
      "event": "signature_required",
      "id": "<string>",
      "created_by": "<string>",
      "description": "Vipps awaiting signature",
      "metadata": {
        "signature_link": "https://sig.example.com/K34K244"
      }
    }
  ],
  "created_at": "2023-11-07T05:31:56Z",
  "created_by": "1c92f7e1-2897-4d46-bdcc-c127a914fb4e",
  "updated_at": "2023-11-07T05:31:56Z",
  "metadata": {},
  "status": "pending",
  "schema": 123
}