{
  "manageEntity": {
    "action": "Save",
    "entityId": "724295268",
    "entityType": "Track",
    "nonce": "0x6ccf0d738778bbeaf05f89e968f916632c310749d3a60eec8aab9dcd344f96ea",
    "signature": "0x381efdc5649321fd4804b0ffa90a969928378c944296e4bd31d728bf63b4e08f7d8e3d618282ccc6950befda06f196a97e67b36a52e0a626dc39575394c140ac1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}