Fulfillment status

[LuisdelosReyes]

I try to create a fulfillment, calling the api, and it returns ok, but it doesn't create it.

/api/2021-10/orders/4615105183974/fulfillments.json

{
"fulfillment": {
"location_id": 66349105382,
"tracking_number": "123456789",
"tracking_url": "??"

                       }
}

Help!!!