{
  "manageEntity": {
    "action": "Save",
    "entityId": "881071976",
    "entityType": "Track",
    "nonce": "0x94b8a5f445151cd5b1874440bcd190a24ac7fa2acc52f523cafe67d3d2f30b36",
    "signature": "0x2d1387d488b0405583f9ba7c425dbfe0b395922f8293b20be1278d0775ea53755a5ab018ab309874831f2a8dc0984898225156da3159e31a95a2c4d2749c1f321c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}