{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146389865",
    "entityType": "Track",
    "nonce": "0x0035b0bfbd6131496b53ffd37d554844adb7ee9f3dbc2652b15499a304d3eb95",
    "signature": "0x53bc320daaeffa1a19a4558052893d26197e92d38b3491bfaba57155ebbb1a085896624142cf649d9814eb9e1fe90835868e81fe04e009a65a38115d3420ad951c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}