{
  "manageEntity": {
    "action": "Save",
    "entityId": "1599659517",
    "entityType": "Track",
    "nonce": "0xb87033556e6d9ea3a6a15d26b5901cf3c6045cc2e34c0c1a3ed57cf90f66f54c",
    "signature": "0xf3a4b084d9827c1210ab382d7453af7ccd355deda2c4f3e2a57491cc59a698d701d65a607a5710fed0ffbd46b72f64e9c10265a83eaf9b90c86e2160c53b54f71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}