The zoho Webhook for time entry add returns a string with value "null" as json instead of just null
[{"payload":{"secondsSpent":"0","parent":{"associatedTicketId":"null","subject":"rehalose for Europe","id":"321","type":"TASKS"},"customFields":{},"departmentId":"321","minutesSpent":"0","description":"To","hoursSpent":"8","ownerId":"321","isBillable":false,"mode":"MANUAL","isTrashed":false,"createdBy":"123","createdTime":"2019-12-05T04:39:53.000Z","invoiceId":null,"id":"123","totalCost":"0.0"},"eventTime":"213","eventType":"TimeEntry_Add","orgId":"232"}]
Ids changed to protect the innocent.