This is the main organization name. This is used to link resource to its group/tenant/organization/enterprise. Then using in path for GET you can set to "~" to use the domain name linked to your token/key instead of the domain name itself when reading for your own domain.

This is the connection-id for a specific connection. It is a base64 of connection-orig-match-pattern if you need to do that. Pre v46 code will use just connection-orig-match-pattern, will fail of : is in the path.