{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253011834",
    "entityType": "Track",
    "nonce": "0xdf62f7c5bfdb5fe36000576caf72ccfe66ea0cadf53fe042a19872057f4632ae",
    "signature": "0xb6db3ff17a89479acd9e5f611c5bb881a433251c0345d38406933e095620e0f93a779e6e56894154a3c1da2083ba48b2be42487199124f97050d96f0e5e44caf1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}