{
  "manageEntity": {
    "action": "Save",
    "entityId": "1983388140",
    "entityType": "Track",
    "nonce": "0x779425d1ad069d8c97c27cf1a0cc478d6c0a959976d383660f9a1da3cef7e1b9",
    "signature": "0x10d3566209703fc4675dcc89d9e4d18cb7e89509f3a6da5f2a01a7a7139edcda2c9e4ce1c7f02a5b0d446c9e51b4dc3751959fd26915ad305fdf26b2ff4530701b",
    "signer": "0x1642AB480EAD0cea9776277347Cbd3e5Fe9889f6",
    "userId": "711757920"
  }
}