{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341783938",
    "entityType": "Track",
    "nonce": "0x4648985292368776406789d450002dc31b092dad82d8dcf73ce20b7dd15ae28c",
    "signature": "0xc0e148dd71a3feb3871750f2af8d6fbbff2c588cc9b94340fcded7f0d707629507e068fc88cebccef9c4df7dffc4f6f504fb098e38436ca72413063fb55e984f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}