what is the deep link for manage customers details?

Manage Customer page but does not query the customer account number included in the link. Tried different combinations but cannot get the customer account to be displayed,

Example format I used, tried without the site value, same result. No data displayed ?

'https://test.instance.oraclecloud.com/fscmUI/faces/deeplink?objType=AR_CUSTOMER&action=MANAGE&objKey=accountNumber=123456789

Action as manage is correct ?
I tried with Edit, Search, Query but nothing worked