curl --location --request PUT '/smartflows//triggers/custom-event/' \
--header 'Authorization: Bearer JWT' \
--header 'Content-Type: application/json' \
--data '{
"name": "Custom activity name",
"eventName": "Banner clicked",
"campaignName": "Banner clicked",
"sendOncePerDays": 5
}'{
"error": "Reason of failure"
}