Order Custom Fields

{
    "jsonrpc" : 2.0,
    "id"      : 1234,
    "method"  : "call",
    "params"  : [
        "34aa989befe360d67fe3f70b3517a1e5",
        "order_custom_field.list"
    ]
}

{
    "result": [
        {
            "custom_field_id": "3",
            "name": "Original Purchase Date",
            "code": "purchase_date",
            "is_active": "1",
            "input_type": "date",
            "is_required": "0",
            "client_note": null,
            "client_permissions": "restricted",
            "is_display_client_grid": "1",
            "is_display_client_form": "0",
            "sort_order": "0",
            "created_at": "2022-07-01T10:46:16+00:00",
            "updated_at": "2022-07-01T10:46:16+00:00"
        },
        {
            "custom_field_id": "4",
            "name": "Main Item SKU",
            "code": "main_sku",
            "is_active": "1",
            "input_type": "text",
            "is_required": "0",
            "client_note": null,
            "client_permissions": "unrestricted",
            "is_display_client_grid": "0",
            "is_display_client_form": "1",
            "sort_order": "99",
            "created_at": "2022-07-01T11:43:28+00:00",
            "updated_at": "2022-07-01T11:43:28+00:00"
        }
    ],
    "id": "1234",
    "jsonrpc": "2.0"
}