Dynamically populating picklist using v7 API is throwing INVALID_DATA error

Hi,

So basically, I've tried all sorts of solutions but to no avail. This is the error I kept on getting:

{

"code": "INVALID_DATA",

"details": {

"expected_data_type": "jsonobject"

"message": "body",

"status": "error"

}

And this is the object I'm passing following the v7 documentation:

const obj = {
    "fields": [
        {
            "pick_list_values": [
                {
                    "display_value": "North_East",
                    "actual_value": "IN_North_East"
                } //Adding options to an existing picklist         
            ]
        }
    ]
}

This is the documentation I was folowing:
https://www.zoho.com/crm/developer/docs/api/v7/update-custom-fields.html

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