curl --location --request GET '/rest/api/3/permissionscheme//permission/'
{"holder":{"expand":"group","parameter":"jira-core-users","type":"group","value":"ca85fac0-d974-40ca-a615-7af99c48d24f"},"id":10000,"permission":"ADMINISTER_PROJECTS","self":"https://your-domain.atlassian.net/rest/api/3/permissionscheme/permission/10000"}