{
  "manageEntity": {
    "action": "Save",
    "entityId": "1843",
    "entityType": "Track",
    "nonce": "0x8dde89f32e3a1b35343c71f0da6cd01bff82b91515f6a715be452f3c2c8fbf24",
    "signature": "0x76c77b8fc4595268096392c390bc3652b102352b79cd7b9fcd7931500cf12aae335fec172e99f0361346c69a8d755ca87a288d757011751191fe5a9d21d2e9021b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}