{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696871908",
    "entityType": "Track",
    "nonce": "0x3cd85b8ab4477ddf49346bf96e19087f19c7ed6b6bda4dba5800a471654d6796",
    "signature": "0x5be80b91996086443ee3ed2f9e3c9ef26e94033a8166f868e2637b02244b0d7d6fbefc21be34b9b0e0a571bf63c55217083a17fd98176c706035b4bc87d5b4761c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}