curl --location --request GET '/v4/ebm/metadata/list?regionID=TestRegionID&azName=az1&instanceUUID=ss-mjybbu6iddgxyvdjskiffp4gqo0z'
{
"statusCode": 800,
"errorCode": "",
"message": "SUCCESS",
"description": "成功",
"returnObj": {
"metadata": {
"key1": "value1",
"key2": "value2"
}
}
}