I have a webhook which updates a picklist field in Marketo. Occasionally it will come back with an empty response, in those cases I would like it to NULL the existing value in the picklist field.
I can control what value is returned in the JSON response but when I try using a value of NULL it doesn't remove the value in the field. I guess I can get around it by returning the NULL value in a string field and then use this to NULL the picklist, but wanted to avoid the 'let's create another field' solution if possible. I'm sure Sanford Whiteman would be able to let me know the answer to this pretty quickly.