Server API Key (format: {keyId}:{secret})
Webhook event types:
coupon.redeemed: Coupon redeemedpayment.created: Payment createdsponsor.created: Sponsor createdcoupon.redeemed, payment.created, sponsor.created Webhook receiver URL
Retry count on failure
0 <= x <= 10Timeout (milliseconds)
1000 <= x <= 30000Success (secret is only returned in this response)
Webhook creation response (includes secret)