{
  "manageEntity": {
    "action": "Save",
    "entityId": "353874440",
    "entityType": "Track",
    "nonce": "1794073052572472542",
    "signature": "0xa30096934898f5fa65a2b0156e06e9a85638e3b63e784caff6c71c4f4e62bc4d4ccfc53baedcb2905dab827020eb6d9b9750eec858dc30e01dfd331b96932d841b",
    "signer": "0x005f093698092a7C2892a87853eAd15b9F8AE333",
    "userId": "240678723"
  }
}