curl --request POST \
  --url https://services.leadconnectorhq.com/conversations/messages/upload \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --header 'Version: <version>' \
  --form conversationId=ve9EPM428h8vShlRW1KT \
  --form 'locationId=<string>' \
  --form 'attachmentUrls=<string>'

{
  "uploadedFiles": {}
}