Command ID. This can be any string, and it's up to the api integrator to ensure uniqueness.
Arbitrary metadata set by the api integrator. Keys must start with 'ext-'
The command type
Command format version / API version
External invoicing id to be attached to the order
Order Id for which the OrderStatusEvent should be sent
Generated using TypeDoc
Set external(integrator's own) invoicing id for an order
Currently this command does not replace, but rather appends the provided id to the existing one.