POST /domains/[domain_id]/applications/[application_id]/cartridges
DELETE /domains/[domain_id]/applications/[application_id]/cartridges/[id]
GET /domains/[domain_id]/applications/[application_id]/cartridges
GET /domains/[domain_id]/applications/[application_id]/cartridges/[id]
UPDATE /domains/[domain_id]/applications/[application_id]/cartridges/[id]
[Validate]