{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497295423",
    "entityType": "Track",
    "nonce": "0xf95100bd6f7949240f5aecd3a3e933d6cbec35b52533e78fd635b2a45258c150",
    "signature": "0x5136af5d867c0b1ed6a7e1c447d7a24130a9f3ad745f9a603f6f02f1f9d890a919afc97a64e9858b686b589e38d0e99ae4d2bd637126ed9708c9eb03b40caa9a1b",
    "signer": "0x616e636616DaA1fED23D5baF54ADF0e80624b961",
    "userId": "52309"
  }
}