Update or edit status filed in JIRA issue

the status field is a special case and can't be updated directly, which is the second problem here. Changing a status in Jira is called a transition. You need to trigger the transition to move the issue into the status you want.

Start by identifying the available transitions by calling the get transitions API:

GET https://example.net/rest/api/latest/issue/FWZH-2170/transitions

This tells you which transitions are currently available, something like this:

{
  "expand": "transitions",
  "transitions": [
    {
      "id": "21",
      "name": "Fixed",
      "to": {
        "self": "https://example.net/rest/api/2/status/10001",
        "description": "",
        "iconUrl": "https://example.net/images/icons/status_generic.gif",
        "name": "Fixed",
        "id": "10001",
        "statusCategory": {
          "self": "https://example.net/rest/api/2/statuscategory/3",
          "id": 3,
          "key": "done",
          "colorName": "green",
          "name": "Done"
        }
      }
    }
  ]
}

Take the id of the transition you want, in this case 21, then post it to the issue transition API:

POST https://example.net/rest/api/latest/issue/{IssueKey}/transitions

Use a request body like this:

{
  "transition": {
    "id": 21
  }
}

You should get a 204 HTTP response from Jira which indicates the transition was successful.