{
  "type": "external_account",
  "audience": "//iam.googleapis.com/projects/000000000000/locations/global/workloadIdentityPools/reqsign/providers/reqsign-provider",
  "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
  "service_account_impersonation_url": "https://iamcredentials.googleapis.com/v1/projects/-/serviceAccounts/test-234@test.iam.gserviceaccount.com:generateAccessToken",
  "token_url": "https://sts.googleapis.com/v1/token",
  "credential_source": {
    "url": "http://localhost:5000/token",
    "format": {
      "type": "json",
      "subject_token_field_name": "id_token"
    }
  }
}