Overrides to for email channel

{
         "name": "user-account-username-modification-validation",
         "to": "652f866f9203e3869e6db7c2",
         "overrides": {
             "email": {
                  "to" : "new@email.com"
              }
         },
         "payload": { "deeplink" : "http://...." },
         "tenant": {
           "identifier": "r43h8301_Vly38wsrHG"
         }
       }