post
POST /v1/presigned-s3-disposition-post HTTP/1.1
Host: 
X-SAJ-Date: text
X-SAJ-Signature: text
Accept: */*
200

OK

{
  "url": "https://example.com",
  "fileUrl": "https://example.com",
  "fields": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  }
}