{
  "manageEntity": {
    "action": "Save",
    "entityId": "122650138",
    "entityType": "Track",
    "nonce": "0xcfd33e80abe767acecaca76defc7d905fddd3ce3f111ae8389692547f1b624be",
    "signature": "0xba462e7b387024ebe0f7e52f7b920ac59dc47b9c9a9192e12e00a766ecd64c8a71ccdf6688bb5439197b660b3111ead67f3945745b69df4aa41a5ebd396a939f1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}