{
  "manageEntity": {
    "action": "Save",
    "entityId": "834128269",
    "entityType": "Track",
    "nonce": "0xe28402247175df8d9498ac22024e19c15f18b1ad06cad8153c3af8d5acb99ac5",
    "signature": "0xc9e883f2a25df0d7c822a39bc7a171a5faf2c2ed3fb5f2b64a1b9a8a327c6265097489c4d40a59c3c26a2e6376ff4c35b45699ac15764bf54344f624a38105ff1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}