{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940080689",
    "entityType": "Track",
    "nonce": "0x925c371a2959bbd48f336c58c8761bf36621b669ce2afc957bfb3feb4665c999",
    "signature": "0x9ac4f5fccdd424025a63bd82b455fad941d6bd1bc9ac09fe8d2e2ee3edcd3ee85ec9eab1d32d7cb15748b6aa0781153f6cd2f7b34cc902cc6094d6224a717a7e1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}