{
  "manageEntity": {
    "action": "Save",
    "entityId": "1933912933",
    "entityType": "Track",
    "nonce": "0x0c08e9c1efe1f5f8302fcb710774f4d75de686ef209e1dcdab464dde72c3cdd5",
    "signature": "0x7396d3a928464829697306d0431b0435b200711c89e6c88239dba14283fd2b0a7fd6f41987174ef630cda0ce3a9dcb9729e212f6f34957225ed392b6956c682d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}