curl -X PUT 'https://api.example.com/tenants/tenant_acme' \
  -H 'Authorization: Bearer YOUR_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{
    "planKey": "enterprise",
    "maxUsers": 200,
    "maxWorkspaces": 50
  }'

{
  "id": "tenant_acme",
  "name": "Acme Corp",
  "kind": "standard",
  "scopeId": "scope_acme",
  "slug": "acme-corp",
  "planKey": "enterprise",
  "status": "active",
  "maxUsers": 200,
  "maxWorkspaces": 50,
  "updatedAt": "2024-01-16T10:30:00Z"
}