{
  "manageEntity": {
    "action": "Save",
    "entityId": "1548674986",
    "entityType": "Track",
    "nonce": "0x5fcb4a48714e27016a9caf0801ffd85b6a606d4039dac1512740096d808bb287",
    "signature": "0x825d717652f7e2cb3a584a8080d4b8a84a72f1a22f99c2952a952dafcab6ced821e0c35476a05dc62eb3cb98d5da06b4142ffe21ffcd03f357ca20bc0ca2a9381b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}