{
  "manageEntity": {
    "action": "Save",
    "entityId": "165876856",
    "entityType": "Track",
    "nonce": "1789967888558926630",
    "signature": "0xaf5831b6ff3769a7ebab9798105950152560169600ce67e9a6f7585b2cfc8cc91a546f8aed5295e12b67c33e33c0918d13df046c491e1d4fa9bf63e55555a16f1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}