{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740468137",
    "entityType": "Track",
    "nonce": "0x7bbf524e46c06ffe0c2f7f02cd697d8096eea531636a45b6198fd390f067c194",
    "signature": "0x1b78548c783775520f2553e9ce960d79a41887fcb53d9bda71c38c03095b29de6c17a3352bccd212d00862732685fb7b696f8fc49cc978e4d504b7321584042b1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}