Attempting to call an api which has urls using https and digest authentication

Can make the GET request work by requesting twice to mimic the digest process and turning SSL cert verification off. These requests also work in a browser merely by pasting the url. The POST requests always fail. The data is raw application/json in the body. Have used the two request but get a 401 regardless. Tried passing the data as params and binary json. Not sure how to choose a forum, so picked the first one.

Examples:

This works: GET "https://192.168.201.85/mars/sources" gets a list of sources"

This doesn't: POST "https://192.168.201.85/mars/sources"

with raw,application/json as follows:

{
  "primaryName": "Test Output",
  "secondaryName": "",
  "secondaryuri": "",
  "URI": "244.23.42.24:33423",
  "type": "",
  "comment": "",
  "adGroups": [
   "public"
  ],
  "input": false,
  "outputs": {},
  "active": false
 }