{
  "manageEntity": {
    "action": "Save",
    "entityId": "968916909",
    "entityType": "Track",
    "nonce": "0xc729f3639102c1bbc310c01a94dab8e8749149f11a0f547c4828dfe89a6fe261",
    "signature": "0x3518bfb4cd82ac2d5f46d29971f4e84373c323591d162485080cab0da59e83200deee04bb2843a6ebb63676e9b3fabc46ed8053ba48c4b96cb75364bf31b0f091c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}