About Zoho Inventory API and Creating a Shipment

Hello,

I’m currently trying to create a Shipment for a Sales Order using Zoho Inventory API and I’m having an issue with the API docs and the actual API.

In Zoho Inventory API docs, while creating a shipment, there are no arguments such as package_ids but when I POST the exact same request shown in the docs (with my own organization_id etc.) I’m getting the response:

{

    "code": 4,
    "message": "Invalid value passed for package_ids"
}

There aren’t any clarifications about this package_ids argument and I’ve tried to create a package, put its package_id on the request body with the
key=package_ids but still getting the same response.

example of request body I've used:
{
    "shipment_number": "SH-00004",
    "date": "2022-10-17",
    "reference_number": "TKG424242",
    "contact_persons": 3522659000000086042,
    "delivery_method": "FedEx",
    "tracking_number": "TRK214124124",
    "shipping_charge": 15,
    "exchange_rate": 1,
    "notes": "shipped",
    "package_ids": [3522659000000094005]
}
and without the square bracket, changing the int to string and combinations of it etc. Still getting the same response with code: 4.

If anyone please look into this issue and respond back to me. Any new docs with a working body as an example would be fine.

Thank you in advance.