Signals Notebook: Variation Tables Headers can only be edited by API

Variation table header values cannot be created through the API, they can only be edited/updated.

You need to first do a GET on the Variant where the header already has a value:

/variationsTables/{variationsGrid_eid}

On the response find your target variant table definition inside "variantTables" then go to "rows":

Find the row with "method": "header":

Copy the id and the key.

For example:

  "variantsTables": [
                {
                    "id": "bd14757f-b0f1-47ee-b5c9-8163dbfbf107",
                    "name": "Variant-1",
                    "rows": [
                        {
                            "id": "fabd019a-97d3-411f-adf1-1c888e193219",
                            "method": "header",
                            "cells": [
                                {
                                    "key": "5333ff62-6b53-4aa8-a7be-ff9c9380ce18",
                                    "type": "text",
                                    "name": "Test Header",
                                    "content": {
                                        "value": "TEST"
                                    }
                                }
                            ]
                        }

On the example above copy id fabd019a-97d3-411f-adf1-1c888e193219 and key 5333ff62-6b53-4aa8-a7be-ff9c9380ce18

Then use a patch operation on endpoint:

/variationsTables/variationsGrid_eid/variants/variant_eid?force=true

In our example, variant_eid is bd14757f-b0f1-47ee-b5c9-8163dbfbf107

Use the following PATCH body with the values you copied before:

{
    "data": [
        {
            "type": "header",
            "id": "fabd019a-97d3-411f-adf1-1c888e193219",
            "attributes": {
                "action": "update",
                "cells": [
                    {
                        "key": "5333ff62-6b53-4aa8-a7be-ff9c9380ce18",
                        "content": {
                            "value": "MY TEST VALUE"
                        }
                    }
                ]
            }
        }
    ]
}