{
  "manageEntity": {
    "action": "Save",
    "entityId": "954770175",
    "entityType": "Track",
    "nonce": "0x1105d5d9646e3b65f57ce1548f8a45159c8327f2eefb6885d670059b3cb638d7",
    "signature": "0xa8428316d5d0836b91c3358eeebd8f01e188f55c4cdc068a4dce13071b30f02f0ef21ef5c696648f94a7005ac542fae66ba3000217709cd04fdde737a8cc5d331c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}