Set Default Split for Product from Artist

curl --request PUT \
  --url https://server26-dot-royalti-project.uc.r.appspot.com/product/{id}/setdefaultsplit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "defaultSplit": [
    {
      "user": "<string>",
      "share": 123
    }
  ]
}'

{
  "message": "Default split set successfully"
}