anchor.diff:  |SUBSCRIPTION_CANCEL
   |Occurs when a subscription is cancelled
   |SUBSCRIPTION_UNCANCEL
  -|Occurs when a cancelled subscription is uncancelled (Note that subscription uncancellation  cannot be done once the cancellation becomes effective )
  +|Occurs when a subscription cancellation is undone (Note that subscription cancellation  cannot be undone once the cancellation becomes effective )
   |SUBSCRIPTION_BCD_CHANGE
   |Occurs when the subscription billing date is changed
   |ENTITLEMENT_CREATION
  
positive.code: |CUSTOM_FIELD_DELETION
  |Occurs when a custom field is deleted
  |TENANT_CONFIG_CHANGE
  |Occurs when a Tenant configuration is modified (For example catalog is created/updated or an overdue configuration is created/updated, etc.)
  |TENANT_CONFIG_DELETION
  |Occurs when a Tenant configuration is deleted
  |===
  
negative.code: |INVOICE_NOTIFICATION
  |Occurs when an invoice is going to be generated for an account in the future (Can be used to notify customers about upcoming bills)
  |INVOICE_PAYMENT_SUCCESS
  |Occurs when an invoice payment is successful
  |INVOICE_PAYMENT_FAILED
  |Occurs when an invoice payment fails
  |PAYMENT_SUCCESS
  |Occurs when payment is successful
  |PAYMENT_FAILED
  