Send Pipe Id as a number on a webhook

I have a list with all the pipe ids I have to process (as numbers, like the pipe url), but when I send the request via webhook, the pipe_id arrives as some kind of hash.
My webhook configuration:

mutation {
createWebhook(input:
{
clientMutationId: "1",
actions: ["card.create", "card.move"],
name: "Integration Name",
email: "email@email.com",
pipe_id: 302682925
url: "https://...",
})
{
  clientMutationId
}}

And this is what I'm receiving in my API:

{
  "Data": {
    "Action": "card.move",
    "From": { "Id": 123123, "Name": "phase 1" },
    "To": { "Id": 321321, "Name": "phase 2" },
    "MovedBy": {
      "Id": 123,
      "Name": "Usar Name",
      "Username": "user-name",
      "Email": "email@email.com",
      "AvatarUrl": "https://..."
    },
    "Card": { "Id": 123123, "Title": "Test title", "PipeId": "2jz9X0eK" }
  }
}

This "PipeId": "2jz9X0eK" needs be the pipe number (302682925).

How can I retrieve this information in the correct format?