{
  "manageEntity": {
    "action": "Save",
    "entityId": "864941028",
    "entityType": "Track",
    "nonce": "0x8faa69cdc499dd241bb9ff9579aa7fd91fff8809f40b060cf286e9c85572654b",
    "signature": "0x977b5778bb3f8683b2b1c04c8a5f5a776601c335256f8b067be6378b9fdc255f553e60a9e1d83108455966cfe93c4080e452c05159773560f1ce68f6fca2d5461b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}