error uploading glb from url

[BeamJokerFavor]

I am importing a glb like so:

my_request = {
      "image": 
        {
        "src": "https://glbs.blob.core.windows.net/glb/BFRBTN.glb"
        }
      
    }

I get the following error.

{"errors":{"image":["\/glb\/BFRBTN.glb is not a valid image file type."]}

Are GLBs not supported? Or is it something with my file name?