You can update a running application with a new configuration by using this request:
curl -i -X POST \
-H "Authorization:<your-authorization-token>" \
-H "Content-Type:multipart/form-data" \
-F "infoMap={\"configs\":[{\"configId\":\"<your-configuration-id>\",\"versionId\":\"<your-configuration-version-id>\"}], \
\"actions\":{\"OPERATION\":\"restart\"},\"devices\":[\"<your-device-id>\"]}" \
'https://<your-iem-url>/portal/api/v1/batches?appid=<your-app-id>&operation=updateAppConfig'