Targeted Email notification for Dropbox new files

I am looking to set up a scenario that will monitor a DROPBOX folder for changes to all subfolders - but then email an update to different people based on which subfolder has new files add.

eg:

(1) PROJECT FOLDER → (2) Survey Folder → (3) New Data Folder (4) if new file added, an email goes to person A)
(1) PROJECT FOLDER → (2) Emails Folder → (3) New Data Folder (4) if new file added, an email goes to person B)

I have used dropbox watch files, then router with filter that looks for the lower path and sub folder name but because there is no change in step (2) the sequence fails.

Any suggestion of a better way to set this up?

This is the folder hierarchy