{
  "manageEntity": {
    "action": "Save",
    "entityId": "82492029",
    "entityType": "Track",
    "nonce": "0x16af018b49f0948e2fa3962ad984ebe599be6366a4e23eda69d9c72f50843ddf",
    "signature": "0xb79cb384c435188a82ac7d69cf100a29e6522bbaaff25df85b235767b889f4ab1177d2ac163cb53a86f96a835f04e27954c1e1ea2236212dc71a20a8b53e2bf01c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}