curl --request POST \
  --url https://api.example.com/v1/prior-auth/authorizations/{authorization_id}/attachments \
  --header 'Content-Type: application/json' \
  --data '
{
  "fileId": "<string>",
  "label": "<string>"
}
'

{
  "id": "<string>",
  "fileId": "<string>",
  "label": "<string>",
  "createdAt": "2023-11-07T05:31:56Z"
}