How to update notifications using EDAA 9.4 RESTful interface?

I found a previous thread, Re: Setting a value in UDF using EDAA  but it remains unanswered.

I’m working on building automation against the EDAA 9.4 interface and I’m having some difficulty getting notification updates, via PUT messages, to take hold. I believe that I do not have the JSON payload formatted correctly, but there may be some other problem that I’m not aware of.

The work flow is the following:

POST to instances/ICS_Notification:: /action/takeOwnership

1. PUT to instances/ICS_Notification:: I’ve been told that this is the correct call, he made a demonstration of it earlier but did not provide payload details.

POST to instances/ICS_Notification:: /action/changed

1. GET to instances/ICS_Notification:: à to confirm changes L

My PUT message is as follows

PUT http://.../instances/ICS_Notification::NOTIFICATION-activeAssetOnly_***_activeAssetOnly HTTP/1.1

X-EMC-MAC-USE-401: TRUE

X-EMC-MAC-NO-TICKET-REDIRECT: TRUE

Content-Type: application/json; charset=utf-8

Host: ...

Content-Length: 129

Expect: 100-continue

{

  "arguments": {

    "User": "User-Test",

    "AuditTrailText": "Testing PUT Insert",

    "TroubleTicketID": 123456

  }

}

But all responses afterward show no change:

Can you please point me in the right direction? This project is constrained to use remote HTTP traffic only, please don’t recommend any solutions outside this constraint. Thank you.