JWT unique identifier has expired or it has an incorrect format

Hi,
I'm trying to integrate the Zendesk SDK into a unity app, but I can't get the JWT token right, it keeps throwing the error: "JWT unique identifier has expired or it has an incorrect format" on the Console, I made sure that the app configuration on site is correct, and my API route is working properly.

This is my payload: 

{
  "email": "triste@teste.com.br",
  "name": "Sofrimento",
  "iat": 1681240444,
  "jti": "0157454f-705c-40e2-926a-8e7d39051eff"
}

Any info is greatly appreaciated.

Thanks.