{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514689424",
    "entityType": "Track",
    "nonce": "0xee87e4241929558c15313fb9bdd837433180dbd13f228bc0d6f4521028b7c67b",
    "signature": "0xbf18bb028322b7516d062393831651e8df319cff824cd39c568512b499829acf52bf73b65f131279aa90cb2cf882655150fe9c286ce1f84f7ae7bda557732a8a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}