added example request and response for PUT /v1/wallet/keys/owner to api docs

docs/api-specs.md

@@ -185,6 +185,11 @@ a key, as the registrar may be unable to issue a `REGISTER` or
 + Parameters
     + keyname: owner (string) - which key to set (one of 'owner', 'data', 'payment')
 
++ Request (application/json)
+  + Body
+
+              "cPo24qGYz76xSbUCug6e8LzmzLGJPZoowQC7fCVPLN2tzCUJgfcW"
+
 + Request (application/json)
   + Schema
   
@@ -238,6 +243,11 @@ a key, as the registrar may be unable to issue a `REGISTER` or
                 ]
               }
 
++ Response 200 (application/json)
+  + Body
+
+              {"status": true}
+
 ## Get payment wallet balance [GET /v1/wallet/balance/{minconfs}]
 
 Fetches wallet balance, including UTXOs from transactions with at