Purpose
This method allows to get existing contract by its id with GB_CBP type through the MIS
Specification
WS logic
Only authenticated and authorized user can use this service
Deleted records won't be shown in response
Authentication
Verify the validity of api-key
Return 401 in case validation fails
Check scopes in order to perform this action (scope = 'global_contracts:read')
Return 403 in case invalid scope(s)
Process
Show requested contract. If requested contract was deleted (is_active = false) or not exist, show 404 Not found instead