{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524981252",
    "entityType": "Track",
    "nonce": "0x4260877f7bd5064beec524f7af8010d9810c137249f2c4cd433908ebb3b6f6e0",
    "signature": "0xa229921dac4233a340e43d95fa729b2105b0ff9d8de510e57f1843c0769b74ee7c569d521b442339c5da854a0d02d4e8a414bee1daf5c4bae19c2464bdbb45261b",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}