{
  "manageEntity": {
    "action": "Save",
    "entityId": "1997337530",
    "entityType": "Track",
    "nonce": "0xf52ee83853b36453cdb860681b973f1aa1034ad7338c2ffc2e48ecfdd13fd2ed",
    "signature": "0x0404fce1c5037eeec2269c72fa1bf1f362ddcdcc9816ca92a05a51f1e12106044273c2224c5a5b9e87ca9059de9b2a5c39d4be542d76174d6b4302de63f378cf1b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}