{
  "manageEntity": {
    "action": "Save",
    "entityId": "614346247",
    "entityType": "Track",
    "nonce": "0x96d65df8fc47e1b8ab23bcc7154349590a6d594a848dbfe8c790a85ab15f08e1",
    "signature": "0xd544aa095116c44d7a71c44418cf00abfa3b788b4bed0b14a1852c07593509656bf03eff4583463ab2ca4647333f30976f4522dfb835c7d2f41bbde7d6d188df1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}