curl --request POST \
  --url https://api.upwell.com/api/rest/rules \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "actionValue": "<unknown>",
    "conditionExpression": "<string>",
    "createdAt": "<unknown>",
    "criteriaField": "<string>",
    "criteriaValue": "<string>",
    "customerId": "<string>",
    "enabled": true,
    "exceptionConfig": "<unknown>",
    "id": "<string>",
    "priority": 123,
    "ruleActionType": {},
    "ruleType": {},
    "updatedAt": "<unknown>",
    "validationExpression": "<string>"
  }
}
'

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