{
  "manageEntity": {
    "action": "Save",
    "entityId": "380834175",
    "entityType": "Track",
    "nonce": "0xcfb4fe0312a09dc55a40da48d920517f54a3fbc788ef5e98ec9ee684d1db890c",
    "signature": "0xb159767088f0cdce3ac9327bc3cf635650e9fd8332273ef3a9cdf62b5da1384847622cf7e509453aba3203b7fe2766835bf713e85ec4966567924c94f79f23981c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}