The call to the /api/2.2/jobs/run-now REST API only triggers the job. You'll need to call different APIs to get the output. The call to jobs/run-now should return a run ID.
If that's successful, then the next step are to:
- check the status of the job to make sure it's completed running using this API: /api/2.2/jobs/runs/get. You may have to loop until the job is done or failed.
- once the job is done, you can get the output for that run using this API: /api/2.2/jobs/runs/get-output