curl --request POST \
  --url https://api.klavis.ai/sandbox/moneybird/{sandbox_id}/initialize \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ledger_accounts": [
    {
      "name": "<string>",
      "account_type": "<string>",
      "rgs_code": "<string>",
      "account_id": "<string>"
    }
  ],
  "contacts": [
    {
      "company_name": "<string>",
      "firstname": "<string>",
      "lastname": "<string>",
      "phone": "<string>",
      "address1": "<string>",
      "city": "<string>",
      "zipcode": "<string>",
      "country": "<string>",
      "sepa_iban": "<string>"
    }
  ],
  "products": [
    {
      "description": "<string>",
      "title": "<string>",
      "price": "<string>",
      "currency": "<string>",
      "identifier": "<string>",
      "frequency": 123,
      "frequency_type": "<string>"
    }
  ],
  "projects": [
    {
      "name": "<string>",
      "state": "active",
      "budget": 123
    }
  ],
  "time_entries": [
    {
      "description": "<string>",
      "hours": 123,
      "billable": true
    }
  ],
  "sales_invoices": [
    {
      "reference": "<string>",
      "details": [
        {
          "description": "<string>",
          "price": "<string>",
          "amount": "<string>"
        }
      ],
      "currency": "EUR",
      "prices_are_incl_tax": false,
      "state": "draft"
    }
  ]
}
'

{
  "sandbox_id": "<string>",
  "status": "idle",
  "message": "<string>",
  "records_created": {}
}