{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480290637",
    "entityType": "Track",
    "nonce": "0x4969ef5dbd1c8c3150228de0a9ce939e5b299ab470b46f23d17e4e466edd35c3",
    "signature": "0x632891cdf4146ed6ca0604331becd8b3f7ff88acff20739bebf09aed1de62f5c169a8846b5cdebbfa9d89383877421b877db237f3ef6f312adf518d888a63c991c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}