{
  "manageEntity": {
    "action": "Save",
    "entityId": "738237",
    "entityType": "Track",
    "nonce": "0x275290d1769396da2e14ea81cfa3b222fb4321436ce3be432172c73a146dc593",
    "signature": "0x70b2156bf600372628c4ee460ed179b5a6adc25c78b66ed693851f0cf50fef99312daebf0a9e60fc0d225cb9f14b4dc3403f6fa24c696ca337ae5c1b55e6ee091c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}