{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000969545",
    "entityType": "Track",
    "nonce": "0x73e73623b93ee04cfba1d9baf29fc5ca3e1dd657346dfa97aab851d275665815",
    "signature": "0xf2dfb5b7777417a279a39c02ab1c214f13f2f201b286a17da86e0da72c7376020a7aab48de6653b0fb0805042138c43e994c1a107b9980069cc6af23a13c27e41c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}