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

{
  "rule": {
    "actionType": "CREATE_EXCEPTION",
    "actionValue": "<unknown>",
    "createdAt": "<unknown>",
    "criteriaField": "<string>",
    "criteriaObject": "EMAIL_MESSAGE",
    "criteriaOperator": "ARRAY_DOES_NOT_HAVE_OBJECT_WITH_PROPERTY",
    "criteriaValue": "<string>",
    "customerId": "<string>",
    "id": "<string>",
    "priority": 123,
    "type": "CARRIER_INVOICE_EXCEPTION",
    "updatedAt": "<unknown>"
  }
}