{
  "manageEntity": {
    "action": "Save",
    "entityId": "107238914",
    "entityType": "Track",
    "nonce": "0x28605a6c91356e228a916e0d8810782d45130415ac319dc7b19da5685dd92bde",
    "signature": "0x663371ece68eb6bc153a8ff4a29b2443675cabc8e8f6e9bdc47cec004253bf8b18b83cbc7119840a772ca9702cc638840253b6037b0ba0abdfd735cd0de9bdc31b",
    "signer": "0xdCAf5149A8084F2C1c72dE882740656EfA9715b4",
    "userId": "994758391"
  }
}