ID of scheduled report: 2551186E-F854-4D1A-ACAE-8ABA02241AE2
Parameters for authentication have been omitted here, what is important here is the option "-X POST", because HTTP-get is not supported for starting tasks.
curl -X POST "https://combitreportserver/api/v1/task/2551186E-F854-4D1A-ACAE-8ABA02241AE2/run"