Send a list of files to a workflow problem issue

Hi,
I am able to send a file as base64 through API
But I want to send a list of files as base64 through API

This body doesn’t work

[
{“filename”:“file1.jpg”,
“contents”:“dazdadz”,
“private”:false},

{“filename”:“file2.jpg”,
“contents”:“dazdadz”,
“private”:false},

{“filename”:“file3.jpg”,
“contents”:“dazdadz”,
“private”:false},

]

Any suggestion ?