File Upload and Add via API

File Upload and Add via API

I've been attempting to upload to via the Files api and I have been hitting the wall with actually getting the file to attach. What type is the API expecting ? Base64 Encoded ? When I do I get a 414 Error.

I would appreciate your help as I am currently getting the following

{"response":{"message":"Error occurred","uri":"/api/files/uploadFileMutlipart","errors":{"code":8103,"message":"\"Attach file to upload\""},"status":1}}