{
  "manageEntity": {
    "action": "Save",
    "entityId": "18141223",
    "entityType": "Track",
    "nonce": "0xcbd9ce1f0a75d9fabceda5a70031e5fceaf868be4a94cb758ec0c462e4a1b3db",
    "signature": "0x538ed2a032a2530d0f969f56e0c5aecaa2470f7b2ba7d0dc8e8acf44d0f37c4e28181e36f4a1c018e57087ccdf5f17a2785a373a0976fd49a98a5d5c46f95b6d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}