curl --request POST \
  --url https://api.plazbot.com/api/contact/{contactId}/files \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --header 'x-workspace-id: <x-workspace-id>' \
  --form contentFile='@example-file'

{
  "success": true,
  "code": 123,
  "errorCode": "<string>",
  "message": "<string>",
  "data": {}
}