examples/signature/signature_test_private_keyset.json

{
  "primaryKeyId":646750478,
  "key":[{
    "keyData":{
      "typeUrl":"type.googleapis.com/google.crypto.tink.EcdsaPrivateKey",
      "value":"EkwSBggDEAIYAhogQize3DetIS6sranu+JIGslvc7eVVGiDmd74DJpk2o8MiIAeM+KTUD1EgPmdmw0Z8Fa5PYVgybse/la3H2N6mXGyXGiBp3iULXOQBKfr/24De3jw3QDy+kwhb3VqJIxNjztDrHQ==",
      "keyMaterialType":"ASYMMETRIC_PRIVATE"},
    "status":"ENABLED",
    "keyId":646750478,
    "outputPrefixType":"TINK"}]
}