{
  "manageEntity": {
    "action": "Save",
    "entityId": "377833095",
    "entityType": "Track",
    "nonce": "0x593e25ef60d45ba3149241ed20315016a32572f31304c134b6dae3b4c2da4078",
    "signature": "0x8c0b23b46a9c44dde1db32333fced0e382452ac9d03439f1bcb4e212a4c19b9e42da071c4a7c152c7c465c388ff68d5c5d58bc2e33399186f3e50cc33e740fb41c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}