{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768096492",
    "entityType": "Track",
    "nonce": "0xff0346b85a0fca347f3052dd5748dc23eb0b030d7147f49e2eb9bd5a04309646",
    "signature": "0x266254b0b1c910e8ce17de613850adbceb94be09bd2942f951aefaa40c6fb7914e0673f4027ddcff99cc8ad080b4bd3f64649cf438e8de79c5a283e32d699a061b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}