{
  "manageEntity": {
    "action": "Save",
    "entityId": "359498064",
    "entityType": "Track",
    "nonce": "0x684f4433fac87dedc28ee994cf540fe339bfa22f4bcccb752fd9b5326264b76a",
    "signature": "0x1d1e6a6bbf35d72244a33459c4ba949eaa34dca769309805d875825d360156ad5b83fbc94fc7d8c26ef946496e29fd16004cea1530d478736b77e83ef653127b1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}