curl --request POST \
  --url https://api.arcuserp.com/v1/returns/{id}/receive \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "items": [
    {
      "return_item_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "quantity_received": 2,
      "receiving_location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "serial_numbers": [
        "<string>"
      ]
    }
  ]
}
'

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}