How to read a field object from a form field mask payload

Question:
how to read a field object from a form field mask payload

Product:
Velo Code Rules in Automation to send info to CMS

What are you trying to achieve:
Depending on the field value, a rule should provide an info text to cms

What have you already tried:
import wixData from “wix-data”;
export const invoke = async ({payload}) => {
var myformName = payload.formName;
var wishList = payload.wishes; //always null
var info = “”;
; //wish list
; //field wishesList

if (wishList == “sam wish”){
info = “myInfo”
}
//TODO send Info to cms Table

return {} // The function must return an empty object, do not delete
};

tried some other variants with error , but I am not an expert in jsp

Additional information:
my example data schema for the payload
{
“formName”: “My form”,
“submissions”: [ {“label”: “label”,“value”: “value”}],
“submissionTime”: “2018-11-13T20:20:39+00:00”,
“formFieldMask”: [“formname” ],
“submissionId”: “edca2245-7ce3-4d95-bfe9-b2012110eb8f”,
“contactId”: “edca2245-7ce3-4d95-bfe9-b2012110eb8f”,
“submissionsLink”: “https://www.wix.app/forms/0d3de1xxxxx”,
“formId”: “0xxx”,
“field:wishes”: “field:wishes”, //how to select field:wishes Objekt veloCode???
…and so on