{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210033479",
    "entityType": "Track",
    "nonce": "0xbe4d32ce86936c42c75fd7371788d4469e791c7249040dacee55c1a1aa4bc783",
    "signature": "0x5d9fb0497b1d6839cb8031fda367fbecd828568bf903fef472de172af6cc1aa504a91e3c2d08368c4edc1148efb75cb0284e0f8d6836daf249bb6ad3819642cd1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}