{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595448646",
    "entityType": "Track",
    "nonce": "0x30ea985d0f8bed71846293d0c8d85e9eb3bd000a8e51dbeb85f119dd5bdb1de3",
    "signature": "0xccd1086190aa94cecf9a1d2826d6250fe5ebc12bad361a2cf73965e465ef7a476d0c19fc95bf2ad333d460d0e0540e27c3659d44d2117db5d29317e219dc28991c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}