{
  "manageEntity": {
    "action": "Save",
    "entityId": "325139",
    "entityType": "Track",
    "nonce": "0xfca4d7f4ddba507bb4e2ce91cf8f66b22506a5a2709ddca1e5fc0a3220d738fd",
    "signature": "0x585b6b953ed7322792d9dbb59b91364d74be9d0e3b826b5554d93470d313938e7f43f1f752a515f82b1fa6b6347e6880c4de0e5cdd1e258c787a57d83a17032d1c",
    "signer": "0x73998AdE36896E26b0A37A7683802dD029033821",
    "userId": "685001893"
  }
}