Problem adding attribute options to configurable product via REST Api

Question

I have been following the Magento documents about API's.

https://devdocs.magento.com/swagger/index_20.html#/

I am using this API:

catalogProductAttributeOptionManagementV1

Using Postman I POST via API:

web/rest/es/V1/products/attributes/sgi_test/options

With the body:

{
    "option": {
        "value": "12",
        "sort_order": 0,
        "is_default": true,
        "store labels": [
            {
                "store_id": 1,
                "label": "U"
            }
        ]
    }
}

And it returns me true but it's not giving me the ID.

What I am seeking for is the ID in order to save the product created into SAP. Could I use another API? Or modify this one and add a function to get the ID?