curl --request GET \
  --url https://api.upwell.com/api/rest/rules

{
  "rules": [
    {
      "actionValue": "<unknown>",
      "conditionExpression": "<string>",
      "createdAt": "<unknown>",
      "criteriaField": "<string>",
      "criteriaValue": "<string>",
      "customerId": "<string>",
      "id": "<string>",
      "priority": 123,
      "updatedAt": "<unknown>",
      "validationExpression": "<string>"
    }
  ]
}