Demystifying iControl REST: Merging BIG-IP Config Files

I'm trying to adapt this script to work with an LDAP account that we are using to post config files to the F5. I've authenticated with the F5 and received a token and tacked the X-F5-Auth-Token header on to all of these requests. For the most part, this works pretty well. Couple of issues/questions: 1. The service account appears to need full Administrator privileges to upload a file to the F5. Is that right? 2. Even with full admin access and terminal access, I cannot seem to get the cleanup to work. The post to /mgmt/tm/util/unix-rm returns a 200 but the file isn't deleted and the response says Permission Denied. Any idea what permissions I'm missing? Thanks!