{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092394554",
    "entityType": "Track",
    "nonce": "0x14410334e1dbf051d7588127d53a832dcd56c1f1be4c89c3e0e419ccdbdc60a3",
    "signature": "0xda5b71a597f0b9536f09932202c34bea76160ae6ad980beef4b929452057f5da262c4a73f22aa73c2f47144f8d2f05a492ce5b91f582123f257952e0e36416291b",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}