curl --request POST \
  --url https://api.fireworks.ai/v1/accounts/{account_id}/evaluators/{evaluator_id}:getUploadEndpoint \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "filenameToSize": {},
  "readMask": "<string>"
}
'

{
  "filenameToSignedUrls": {}
}