Contains all the companies related to the parent Alert.
For example, a change of the steel price may affect multiple manufacturers.
When filtering by where.company.id, this list will still contain a full set of companies related to the Alert, not just those with matching IDs (but at least one of the Companies will have a desired ID)
Holds additional metadata related to the specific Alert.
Please, note that the metadata structure varies depending on the Alert's dataset, variable and class.
You may find examples of payload Object here.