curl --request PUT \
  --url https://{cluster}.voucherify.io/v1/loyalties/{campaignId}/earning-rules/{earningRuleId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-App-Id: <api-key>' \
  --header 'X-App-Token: <api-key>' \
  --data '{
  "validation_rule_id": "val_7SxpdhPeBngA",
  "loyalty": {
    "type": "FIXED",
    "points": "5"
  },
  "source": {
    "banner": "Order paid 5 points."
  },
  "active": true,
  "start_date": "2022-11-02T13:00:00.000Z",
  "expiration_date": "2023-03-03T14:30:00.000Z",
  "validity_timeframe": {
    "duration": "PT1H",
    "interval": "P1D"
  },
  "validity_day_of_week": [
    0,
    1,
    2,
    3,
    4,
    5
  ],
  "metadata": {
    "Type": "Order paid - fixed amount of points"
  }
}'

{
  "id": "ern_63g6NQgtepfXn2z0QbT2ksLf",
  "created_at": "2022-11-29T11:10:46.523Z",
  "updated_at": "2022-11-29T11:30:57.652Z",
  "validation_rule_id": "val_7SxpdhPeBngA",
  "loyalty": {
    "points": 5,
    "type": "FIXED"
  },
  "event": "order.paid",
  "source": {
    "banner": "Order paid 5 points.",
    "object_id": "camp_fkZ28pe7DUAEmmabofkxHI8N",
    "object_type": "campaign"
  },
  "active": true,
  "start_date": "2022-11-02T13:00:00.000Z",
  "expiration_date": "2023-03-03T14:30:00.000Z",
  "validity_timeframe": {
    "duration": "PT1H",
    "interval": "P1D"
  },
  "validity_day_of_week": [
    0,
    1,
    2,
    3,
    4,
    5
  ],
  "object": "earning_rule",
  "automation_id": "auto_knM56LS3oygL0Ue0oeSNt4WA",
  "metadata": {
    "Type": "Order paid - fixed amount of points"
  }
}