location link in the response to determine the status of the task and use Get task to obtain subsequent updates.curl --location --request PUT '/rest/api/3/issuesecurityschemes/project' \
--header 'Content-Type: application/json' \
--data-raw '{
    "oldToNewSecurityLevelMappings": [
        {
            "newLevelId": "30001",
            "oldLevelId": "30000"
        }
    ],
    "projectId": "10000",
    "schemeId": "20000"
}'{
    "description": "string",
    "elapsedRuntime": 0,
    "finished": 0,
    "id": "string",
    "lastUpdate": 0,
    "message": "string",
    "progress": 0,
    "result": null,
    "self": "http://example.com",
    "started": 0,
    "status": "ENQUEUED",
    "submitted": 0,
    "submittedBy": 0
}