Actually I figured out that combination of iDrac version and controller type doesnt support the Secure Erase API at all.  Anyway thanks for your reply on this topic
hi,  im following the DELL Redfish manual for idrac 2.70. trying to use Secure Erase disk feature  as per manual the syntax should be straight forward yet im always getting error saying that request body is malformed ??? here is the command in curl format :
Redfish API Secure Erase error