Currently, CC returns "[ ]" for this structure:

[ { fn: 'index.html',
size: 1482,
sha1: '59f1e65c3576dfc0bf839d1822e644644a80c2fb' },
{ fn: 'manifest.yml',
size: 207,
sha1: 'dce3b3949eb4c28c4a01cfdbe614e6de16d204bb' } ]
[]

If I send the response: [] in the method upload:
http://apidocs.cloudfoundry.org/214/apps/uploads_the_bits_for_an_app.html

I receive this answer:

400
{ code: 160001,
description: 'The app upload is invalid: invalid :resources',
error_code: 'CF-AppBitsUploadInvalid' }

What is right format for [] if CC returns this value?

In node, I make this request:

request({
method:'PUT',
uri: url,
auth:{bearer:access_token},
formData:{
async:'true',
resources: JSON.stringify("[]"), <-- QUESTION
application:fs.createReadStream("./StaticWebsite_HelloWorld.zip")
},
json:true
}

Many thanks in advance.

Juan Antonio