curl --request GET \
  --url https://sandbox-api.prava.space/v1/customers/{customer_id}/carts \
  --header 'Api-Key: <api-key>'

{
  "data": {
    "count": 1,
    "carts": [
      {
        "cart_id": "c1b2a3d4-e5f6-7890-1234-567890abcdef",
        "merchant_id": "m1e2r3c4-h5a6-n7t8-9012-3456789abcde",
        "status": "open",
        "created_at": "2025-10-15T05:36:43.000Z",
        "updated_at": "2025-10-15T05:36:43.000Z"
      }
    ]
  },
  "meta": {
    "request_id": "req_12345",
    "timestamp": "2025-10-15T05:36:43.000Z"
  }
}