I'm trying to create issues with Jira's REST API, but I'm not getting it.
{"errorMessages":[],"errors":{"summary":"Field 'summary' cannot be set. It is not on the appropriate screen, or unknown.","parent":"Could not find issue by id or key.","description":"Field 'description' cannot be set. It is not on the appropriate screen, or unknown."}}
I get the following message:

Is my JSON correct?
What's my mistake?