curl --request POST \
  --url https://api.upwell.com/api/rest/generate-upload-presigned-url \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "associationId": "<string>",
    "fileName": "<string>",
    "isPod": true,
    "mimeType": "<string>",
    "sourceSystem": "<string>",
    "sourceSystemId": "<string>",
    "visibleToCarrier": true,
    "visibleToCustomer": true
  }
}
'

{
  "generateUploadPresignedUrl": {
    "documentId": "<string>",
    "uploadUrl": "<string>"
  }
}