I am using Power BI API.
I've got a dataset with some tables and rows.

From [Power BI API Console](http://docs.powerbi.apiary.io/) I don't have any issue when retrieving datasets or tables.

However the PUT verb on a table resource to update its schema always **returns a 504 - Proxy request timed out**

It's the first time I use Apiary IO so it might be its problem and not Power BI update, but that leads me to some questions:

1. Is there any workaround to test Power BI with, for example, Fiddler? I can type the url and body but I will need an Authorization header with the OAuth2 token if I'm not mistaken. How can I get that? ApiaryIO seems to hide it.
2. As per [Update Schema Documentation](http://docs.powerbi.apiary.io/#reference/datasets/table/update-an-existing-tables-schema) the URL with the resource is `https://api.powerbi.com/v1.0/myorg/datasets/{myDatasetId}/tables/{myTableName}`
and the verb is a `PUT`. What is then the meaning of the `"name": "???"` parameter that goes in the JSON body? Is it the table's name or something else? I am assuming it's the table name but it seems redundant as I am already accessing the resource `{myTableName}` as per the given URL.
3. And my last related question is how to rename a specific table's column without modifying its data? This is what I'm trying to achieve by updating the schema but I don't understand how does Power BI know what column I am trying to rename.

Thank you!