curl --request POST \
--url https://{cluster}.voucherify.io/v1/rewards/{rewardId}/assignments \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--header 'X-App-Id: <api-key>' \
--header 'X-App-Token: <api-key>' \
--data '{
"campaign": "camp_OTuGGP90PivbvROsRvfM65El",
"parameters": {
"loyalty": {
"points": 39
}
}
}'