manila/api-ref/source/samples/share-actions-grant-access-request.json

{
    "allow_access": {
        "access_level": "rw",
        "access_type": "ip",
        "access_to": "0.0.0.0/0",
        "metadata":{
            "key1": "value1",
            "key2": "value2"
        }
    }
}