{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507322522",
    "entityType": "Track",
    "nonce": "0x8eb9db179d72bc2dfb50f48ea507717be0134e4aa37df0be2c92b21115969d55",
    "signature": "0x0cc57bc36d25f5f6d6a12a0f316b7ab158eceb5d715abbaa6d80bea20482c0661f17adc9e2258f085571be60ddc165adc6a587e2d776bc1fbc21ae74be55645f1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}