curl --request PUT \
  --url https://firstpromoter.com/api/v1/rewards/update \
  --header 'X-API-KEY: <api-key>'

{
  "id": 123,
  "amount": 123,
  "created_at": "<string>",
  "lead": "<unknown>",
  "event_id": "<string>",
  "conversion_amount": 123,
  "tier_level": 123,
  "promoter": {
    "id": 123,
    "status": "<string>",
    "cust_id": "<unknown>",
    "email": "<string>",
    "created_at": "<string>",
    "temp_password": "<string>",
    "default_promotion_id": 123,
    "pref": "<string>",
    "default_ref_id": "<string>",
    "note": "<string>",
    "w8_form_url": "<unknown>",
    "w9_form_url": "<unknown>",
    "parent_promoter_id": "<string>",
    "earnings_balance": {},
    "current_balance": {},
    "paid_balance": {},
    "auth_token": "<string>"
  },
  "promotion": {
    "id": 123,
    "status": "<string>",
    "ref_id": "<string>",
    "promo_code": "<string>",
    "customer_promo_code": "<string>",
    "target_reached_at": "<string>",
    "promoter_id": 123,
    "campaign_id": 123,
    "referral_link": "<string>",
    "current_offer": {
      "id": 123,
      "name": "<string>",
      "amount": 123,
      "unit": "<string>",
      "default_promo_code": "<string>"
    },
    "current_referral_reward": {
      "id": 123,
      "amount": 123,
      "unit": "<string>",
      "name": "<string>",
      "per_of_sale": 123,
      "default_promo_code": "<string>"
    },
    "current_promotion_reward": {},
    "current_target_reward": {},
    "campaign_name": "<string>",
    "hidden": true,
    "visitors_count": 123,
    "leads_count": 123,
    "customers_count": 123,
    "refunds_count": 123,
    "cancellations_count": 123,
    "sales_count": 123,
    "sales_total": 123,
    "refunds_total": 123,
    "active_customers_count": 123
  }
}