Webhook receiving raw JSON

I’m creating my first webhook and having trouble getting the values to insert into a db record. The insert is happening (the record is created) however all the post values are null.

Here is the incoming json:

{
  "error": null,
  "item_id": "A33VGE7MZBCKrenEkzlPcnldroXXjyf1Naklq",
  "new_transactions": 17,
  "webhook_code": "INITIAL_UPDATE",
  "webhook_type": "TRANSACTIONS"
}

And the server action:

Screen Shot 2019-06-30 at 10.24.32 AM.png2722×1390 410 KB

I’m assuming I’m doing something wrong here…ideas?

Thanks,

–Ken