{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044465",
    "entityType": "Track",
    "nonce": "0x42b9a5baefc4f30cf9320a28d232d858d26c506c89177c73057e7604ef71e89c",
    "signature": "0x5f7018157d28fddfb54f757dc77c29c86328270e3f9e24c60f232bbae088756c7cd1e88a6e1bffc55db7c4cf5d60a54c3bea27a2f7c519dae326637c6739e8ab1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}