Redmine

Hi,
I've tried to use REST API for creating issues but found that there no way to post multiple attachments via JSON - it works for single attachment only!
When I post an "upload" JSON data as array (with brackets '[]') under "uploads" node, redmine API successfully creates an issue but without attachments - it simple ignores it. It works only if I put a single attachment straight under "uploads" section, without using an array format ('[]').

Can someone help me with this issue?