Create a SharePoint Document on site with Managed Metadata using REST

Can I create a document using REST services on a SharePoint site that has managed metadata? We are on Office 365.

I tried something like this:

https:{_sitename}/_api/web/GetFolderByServerRelativePath('{filename}')/Files/add(url='a.txt',overwrite=true)

and get

{
    "error": {
        "code": "-1, Microsoft.SharePoint.Client.InvalidClientQueryException",
        "message": {
            "lang": "en-US",
            "value": "Cannot deserialize data for type Microsoft.SharePoint.SPResourcePath."
        }
    }
}