Error when exporting saved objects

I'm getting the following error when attempting to export saved objects:

{
  "statusCode": 400,
  "error": "Bad Request",
  "message": "[request body.attributes]: expected value of type [object] but got [undefined]"
}

I've tried exporting by ids and by type. Here's my request to export by type:

POST /s/***/api/saved_objects/export HTTP/1.1
Authorization: Basic ***
kbn-xsrf: true
Content-Type: application/json; charset=utf-8
Host: ***:***
Connection: close
User-Agent: Paw/3.3.6 (Macintosh; OS X/12.1.0) GCDHTTPRequest
Content-Length: 20

{"type":"dashboard"}

Any idea what I'm doing wrong? Thanks!

It's _export (seems like you are missing the underscore in the beginning)

That was it. Thanks.