How to add fix query in the breadcrumbs filter in service portal

[RuhiJ5906447193]

Hi all, 

The requirement is to show the list of articles on portal with bread crumbs filter and add the fix filter as 'knowledge base is IT and workflow state is Published.'(No one should be allowed to remove the filter)
I have used the OOTB widget- 'Data Table from URL Definition' for above requirement.

Did some R n D, and found that inside this widget, another OOTB widget- 'Data table' is called and inside that another OOTB widget 'Filter Breadcrumbs' is called.
By default, breadcrumb filter was not shown on the list.
I added below piece of code in 'Additional option, JSON format' in 'instance with table' for widget 'Data Table from URL Definition' and now I can see the breadcrumb filter.
{
"enable_filter": {
"value": "true",
"displayValue": "true"
}
}
The breadcrumb filter(All)l looks like below-

The issue now is I want to add the fixed query in a filter as 'Knowledge base is IT and Workflow state is Published.'
I tried adding below code in the same place where above code of enabling filter was written.
But it is not working.
Can someone please help on how and where to add the fixed query in the filter which can't be removed from the filter by any user although user can add other filters along with the fixed filter but cannot remove the fixed query?
Any help is appreciated.
@Ankur Bawiskar @Mike Patel @Dr Atul G- LNG Can you please help here

Thanks in advance.

Thanks in advance

[Dr Atul G- LNG]

@Sandeep Rajput can u help here.

[Ankur Bawiskar]

@RuhiJ5906447193 

check these links and you should be able to achieve

Using sysparm_fixed_query as a filter in "Data table from Instance Definition" widget 

Fixed query in a "Data Table From Instance Definition" widget? 

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