{
  "manageEntity": {
    "action": "Save",
    "entityId": "847714320",
    "entityType": "Track",
    "nonce": "0xd6c86f010445dce589286c077a42211282e56a24170ed9cdd6890a8d377dfb52",
    "signature": "0xd6f096a6750082f0ad38a5245cfd2c812535ca22071f0459bbfe19714123bf704eb56f074acfbf4ffb1f682f2cf7c755dde63c7b0e0fe0c19ba32fa154a431631c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}