REST API URL to filter search result based on Change Admin

Hi all,

How to filter search result based on Change Admin value using WRS 

Sample Change Admin Structure :

"ChangeAdminI": [
 {
 "DisplayName": "NAME",
 "PrincipalID": "PID"
 },
 {
 "DisplayName": "NAME",
 "PrincipalID": "PID"
 }
 ]

Thanks in advance

/VR