{
  "manageEntity": {
    "action": "Save",
    "entityId": "985424047",
    "entityType": "Track",
    "nonce": "0xe96b105cc9d110f7c4869c4775811b662778dbec01e18b663b8a6ca79bb8cafe",
    "signature": "0xcc7836382f2420cd58a438d03e731a73c773173c499495275952525f85067f276f15a4ef24d2d5ff5276a0b610d0d425e69141fb5ac5c821717b37f0f18a212b1c",
    "signer": "0x9B1Bddbfd19BB66717F178D531ce37dC714fAA1E",
    "userId": "868248368"
  }
}