{
  "manageEntity": {
    "action": "Save",
    "entityId": "1746564566",
    "entityType": "Track",
    "nonce": "0x2a571d94fab853025ddab0efaa2ec15143ecf675d5abd2bd23cd2185b796b1b5",
    "signature": "0xd63c11c8b87c33358d65feed22888c5c17203bb6f4dbd9785b67aa29a688ed245db047a0a5ce1be05c9eb14912c3745b7afa3af5aa288e24aa8074d11dd384b71b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}