{
  "manageEntity": {
    "action": "Save",
    "entityId": "159633",
    "entityType": "Track",
    "nonce": "0xf6052a8ab572b54faaf8c811eec7c39eee643fba050a9fee49079e05c058dfa6",
    "signature": "0xff22bdaa2e088473e9c96e0fadb62f17db8fb753648fa32548f2f1311928517379af1ae8d359f4f8876c1a98d5ab3701b7691e19aaf745039707e4a12723ba6f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}