A Centrifuge Node can be used as a host of multiple Centrifuge accounts. Therefore every API call, that requires an account as a context, needs to provide an authorization header.
At the moment the authorization header is simply the Centrifuge ID of the account:
Assuming that my Centrifuge ID is
0x8c8cfaf851d1, the header will be as shown for a curl request:
-H "authorization: "0x8c8cfaf851d1"