The following should be setup/ready before the import:
1. Consumption Site - customer should have an existing consumption site. Customer Number is used as the JSON mapping for customerAccount.
2. Devices - consumption site should have an attached devices. Device Tank Monitor Serial # (serialNumber) and device Tank Serial # (deviceId) are paired with customer number where the combination is used as mapping for import.
3. Clock Reading - a reading date entry should also exists in Clock Reading as this is being mapped as lastReportedDate.
The date should also not exist in Events tab of the Consumption Site.