{
  "manageEntity": {
    "action": "Save",
    "entityId": "545208",
    "entityType": "Track",
    "nonce": "0xb35d8fdaedd319ad5660a15bed8a555f450bc56f6a2d7b9af49972d0837443c9",
    "signature": "0x7482bd69ebc90756fa78ae83006e0fb3b4939ec89201943db88a729af984e3f4207ae0d867dcf855f3b6ed4227f68b3d162ce982efea78465ae4c72a880570031b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}