{
  "manageEntity": {
    "action": "Save",
    "entityId": "1986604510",
    "entityType": "Track",
    "nonce": "0xc48a0df6614810da7394d54f13135ec7e7ce69a189b36cabe40db92edb3ae981",
    "signature": "0xac5183ab531b8c96d9ead351c671589794f5b99499278016e9436a48c5162f0621ab1f934e7fab2c6a06e31becb767a8173c43f9284dea61974a788777e393181c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}