{
  "manageEntity": {
    "action": "Save",
    "entityId": "1069940",
    "entityType": "Track",
    "nonce": "0x0a841ebed851189a2bba7cc825443efecb5a8acb0a0904fa4ecc9b4be9223dfc",
    "signature": "0x7b80d5c99059dcf9b221c0cea18667882ba97eacddb338dd3b5839d9d6eb0a7d56da554de168a0d3685a1625f1364926b537b0f11385c4cbdf552eb37bcd1d9b1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}