curl --location --request PUT '/smartflows//triggers/scheduled-start/' \
--header 'Authorization: Bearer JWT' \
--header 'Content-Type: application/json' \
--data '{
"name": "Custom activity name",
"startDateTime": [
"2025-05-15T12:00:00+02:00"
],
"sendTimeOptimization": false
}'{
"error": "Reason of failure"
}