Informations about the customer.

This is a flat object, that is, no nested structures like lists and objects are allowed inside this object. Only primitive types are allowed, as seen in the example. If the model was trained with data that goes beyond our base layout, you can include these extra fields here. And even if the current model doesn't have this extra information yet, you can add it here to use in the future as data to new models. You can anonymize these field names and values, our models won't care about the actual value. Just ensure there will be field-wise consistency, not mixing types.