| Name | Type | Description | Notes |
|---|---|---|---|
| uploadUrl | string | Signed URL to upload the image to with a multipart/form-data POST. | |
| fields | array<string,string> | Form fields to send alongside the file in the multipart POST. | |
| objectName | string | Key of the uploaded object — send it to the attach-image endpoint. | |
| maxBytes | int | Maximum accepted upload size in bytes. |