BigIP VE 11.6.0 modify json subcollection for SNMP

Hi all, I'm trying to automate modifying the SNMP community string via icontrol REST API, using curl on linux, on our BigIP Virtual Edition appliances. It's a subcollection in /mgmt/tm/sys/snmp but I just can't figure out the right PUT method syntax. I've read the icontrol user guide and I'm missing something that I need some help on. Here's the JSON output:

 

 

"communitiesReference": {
    "isSubcollection": true,
    "items": [
        {
            "access": "ro",
            "communityName": "public",
            "fullPath": "/Common/comm-public",
            "generation": 0,
            "ipv6": "disabled",
            "kind": "tm:sys:snmp:communities:communitiesstate",
            "name": "comm-public",
            "partition": "Common",
            "selfLink": "https://localhost/mgmt/tm/sys/snmp/communities/~Common~comm-public?ver=11.6.0",
            "source": "default"
        }

 

 

I basically want to modify pair "communityName":"public" to "communityName":"nonpublic" as an example. That's it. My curl syntax is like so:

 

 

curl -sk -u admin:admin -H "Content-type: application/json" -X PUT -d '{"communities": [{"access":"ro","communityName":"nonpublic"}]}' 'https://10.1.1.25/mgmt/tm/sys/snmp | python -m json.tool'

 

 

My error when I run that is:

{ "code": 400, "errorStack": [], "message": "one or more configuration identifiers must be provided" }

I don't know what I'm missing. Thank you!