{
  "manageEntity": {
    "action": "Save",
    "entityId": "193136",
    "entityType": "Track",
    "nonce": "0x5bd5806dc255d7fd63a815fd057592f56e186e3060fb4468f99ded8b5148bf07",
    "signature": "0x65876fdd97b3169f3e3ca06530fc45ac9a4bdc10806c13432f0288a5d131fdf516d8c181134c35d62f11d44e034190637f77fbaa6f6ecf8167b3fc15892562a21b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}