{
  "manageEntity": {
    "action": "Save",
    "entityId": "294467",
    "entityType": "Track",
    "nonce": "0xeaaf3e4517eead7b8a3f33079396b63c388eaf57a2e05d92f1cb5b22415bac81",
    "signature": "0x2610b7d812dc519a402741cb7f1f0502b11283143b882df202a3b1a5ba2dbfab1b45a62da43352355c44a0c8cbac4b8dd8f38c8a5d6ab41462c29cd611ab7d9d1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}