{
  "manageEntity": {
    "action": "Save",
    "entityId": "511708",
    "entityType": "Track",
    "nonce": "0xb6e3cb097678949b1be806e4044b6e6c3f8b749de714aa86381915a7525e7174",
    "signature": "0x867ae76402641f678c6cb573835230dea2a8de6d7561b521b75857bdc86c05b903b5ebc4b472a5d765dc54d01e1945c61c4764a096817d09b3a16d43648b5ead1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}