{
  "manageEntity": {
    "action": "Save",
    "entityId": "839979909",
    "entityType": "Track",
    "nonce": "0xa8c851536dd65b18e0ce30fb85cb8eba5c2fb62d0303a8f45c3e856a749860cb",
    "signature": "0x37d67a1118e1e86ebcdd4a4f38c8a10dae5049504163e9a83415503a692548d262f75bb7f8c00dffd9f47d3084e9af479e8a09052d80b083bec3946a2c8df1c91c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}