{
  "manageEntity": {
    "action": "Save",
    "entityId": "1715508427",
    "entityType": "Track",
    "nonce": "0xe15b0069d241f83ab99a2e5c6db35ba26cf93302ec82deb6351100f3c38a694b",
    "signature": "0xfbc4389e5694bbd5ad93515f472f7b910de3923dd72d4ea1bf050ebf721fc57339fea84ffe3b0752394020a1378a322478e84737c1703b7daa3179de6e45715b1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}