curl --request POST \
  --url https://kan.bn/api/v1/cards/{cardPublicId}/attachments/upload-url \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "filename": "<string>",
  "contentType": "<string>",
  "size": 26214400
}
'

{
  "url": "<string>",
  "key": "<string>"
}