Request format
    You must specify the 
BEMS
    endpoint in the API. The endpoint specifies where the object address is located.Endpoint: <BEMS FQDN>/api/contactgroup
The format for the HTTP Request to retrieve personal distribution lists from a
    mailbox in 
BEMS
 is:POST <BEMS FQDN>/api/contactgroup <request-header> <request-body>
The following is a sample request header:
Content-Type: application/json X-Good-GD-AuthToken: <GDAuthToken>