{
  "manageEntity": {
    "action": "Save",
    "entityId": "368428",
    "entityType": "Track",
    "nonce": "0x3fcf1898d481c19fd9cd4246c34ca5e8dc3fa63fd1ffa070df5326e6ad02e573",
    "signature": "0x15ad425d2d49e07ea639d12673c0240d5bb9b43154642f7f4c65549d12937870770a9a41d5a019b031223c966db7511131ce244ee269919e95386b9a91fb50f91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}