{
  "manageEntity": {
    "action": "Save",
    "entityId": "284511",
    "entityType": "Track",
    "nonce": "0x439215ca1d58fb425b50296a42b2dd6231a59068b4a4debbdf23618db682cbf2",
    "signature": "0x70a9d3c3144cdf335aa992cc4bd698fb24d263b3a171ce42f2152ec96270b8a7736b4963c1f84360f1211718ba48ad913198e33da6748a869d292e46f45dd11b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}