{
  "manageEntity": {
    "action": "Save",
    "entityId": "1431556310",
    "entityType": "Track",
    "nonce": "0xfd305fba1656408c0a22d9db41785f1afe376cde3a8ace24a2ea4d4a28195788",
    "signature": "0xb5c2929a307842928456aacc0c7dfd7f583795203b1fa7a9e7095293bc4cbbcc1e3267bdbe7219efb4fd8b386ec38e612302f970ee18ff4aa60820d65c7380c81c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}