BeginMultipartUploadParams

{
  "accountId": String,
  "beginMultipartUploadRequest": BeginMultipartUploadRequest
}

{
  "accountId": "YOUR_ACCOUNT_ID",
  "beginMultipartUploadRequest": {
    "metadata": {
      "myCustomField1": true,
      "myCustomField2": {
        "hello": "world"
      },
      "anotherCustomField": 42
    },
    "mime": "image/jpeg",
    "originalFileName": "example.jpg",
    "path": {
      "fileName": "image.jpg",
      "fileNameVariablesEnabled": true,
      "folderPath": "/uploads",
      "folderPathVariablesEnabled": true
    },
    "protocol": "1.0",
    "size": 43182,
    "tags": [
      "images/profile"
    ]
  }
}