How to response to a successful POST Action?

The specification doesn't have a very clear explanation and with no example... 
Suppose I defined an action that allocates IPv4 address from an IPv4 pool.

POST /redfish/v1/oem/IPv4Pools/{id}/Actions/IPv4Pool.Allocate
Request Body:
null

In case of success, I think the response should at least contains the allocated IPv4 address. Is the following response correct?
Response Status Code: 200
Response Body:
{
    "IPv4Address": "1.1.1.1"
    "@message.ExtendedInfo": {
        "@odata.type": "",
        "MessageId": "Base.1.0.Success",
        ....
    }
}

IN case of failure, I think the response is explicit like this:
{
    "error": {
        "code": "Base.1.0.GeneralError",
        "message": "A general error has occurred. See ExtendedInfo for more information.",
        "@message.ExtendedInfo": [{
            "odata.type": "",
            "MessageId": "IPv4Pool.1.0.Empty",
            ....
        }]
    }
}