{
  "manageEntity": {
    "action": "Save",
    "entityId": "766519",
    "entityType": "Track",
    "nonce": "0x2fda2147e07d1124a1094e01649267c24965abc200831452b2481f18027dcd2b",
    "signature": "0x2f56d9ac5aef17221d449c1be419956162fb4d802f720d88adfcaefac47d482c302f0d960a91ef157016e5efdcd9a44d7c6344a9d5a9adbfc8cd6c4d7616be2e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}