hi i have found a example in the VMware vCloud Director Documentation Center
Request:
PUT https://vcloud.example.com/api/vApp/vm-4 Content-type: application/vnd.vmware.vcloud.vm+xml
...
<?xml version="1.0" encoding="UTF-8"?>
<Vm ...>
...
<StorageProfile type="application/vnd.vmware.vcloud.vdcStorageProfile+xml" name="Gold" href="https://vcloud.example.com/api/vdcStorageProfile/3" />
</Vm>
Response:
202 Accepted Content-Type: application/vnd.vmware.vcloud.task+xml
...
<Task ... operation="Updating Virtual Application Linux FTP server (7)" ...> ... </Task>