Retrieve report template with OData

Hi all,

I need to retrieve template reports via the OData API. I have used the following API

/Windchill/servlet/odata/IE/InvokeIETask

{ 
 "Task": "com/ptc/windchill/enterprise/report/ExecuteReportTemplate.xml",
 "Params": [
 {
 "Name": "object_ref",
 "Value": "wt.query.template.ReportTemplate:1234"
 }
 ]
}

now i need to change the report criteria directly from the API. i tried to add a parameter but it doesn't seem to work. where can i find documentation? what is the correct parameter to pass?

I have this criteria