{
  "manageEntity": {
    "action": "Save",
    "entityId": "812046708",
    "entityType": "Track",
    "nonce": "0x8b69ab47d20f9080060a63a6a6f67d001087df18689d4066080ed62f7138090b",
    "signature": "0x7fa0e9eb19aba85f79320bad935adf1aada610e1f27833b25790970b212b05ba52c303212fb75ca22d49d0c9b47124425e5a0c437365449ea93c1ec50ebc52c01c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}