{
  "manageEntity": {
    "action": "Save",
    "entityId": "831680607",
    "entityType": "Track",
    "nonce": "0x89bc86b17f123527f5bb15795c8734b2f59b8c757e5a0cf71b2044e190beff4a",
    "signature": "0xd9134a688235813186f69f0beee6f161a1550c7c30afb3a2259a74e76494150271e0c880a0238662ea99c3e547cd031937d69668a9d92cc26553ecbe8277b77f1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}