{
  "manageEntity": {
    "action": "Save",
    "entityId": "100007454",
    "entityType": "Track",
    "nonce": "0x218fdfba7e3a7117b5c19caf77bdd13a6fbe33d45599eee2bdbcb9bf3b47c26d",
    "signature": "0x6aaafa5a9a9c59e3e36de59b211f490be1b72759691418e9c0ae800e20be96db64403757d1c032ba9eb846df4d9569c32a6c9b061dc659da349a9c4bab26c1871b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}