curl --request POST \
  --url https://api.finta.io/v2/transactions/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "updates": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "categoryId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    }
  ]
}
'

{
  "updated": 123
}