Why webhooks does not work with TRPC?

  deposit: publicProcedure.input(z.any()).mutation(async ({ ctx, input }) => {
    console.log(input);
    return { input };
  }),

{
  "result": {
    "data": {
      "json": {
        "input": null
      },
      "meta": {
        "values": {
          "input": [
            "undefined"
          ]
        }
      }
    }
  }
}