{
  "manageEntity": {
    "action": "Save",
    "entityId": "819850548",
    "entityType": "Track",
    "nonce": "0xf9579eaf74a734ab114b5f3ac4732499a1c93c25bafa3951e58cb21d31276343",
    "signature": "0x2b10510f8d5b3561ee4e964014ce8ca2d5bb85720b6cf0d8dfdf7417c251498114e10a538932dcfbb9d1aa125edb74f25d149081546960618152441971c254fc1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}