{
  "manageEntity": {
    "action": "Save",
    "entityId": "140465",
    "entityType": "Track",
    "nonce": "0x413189feae9f3c63dc5839678a888f630d4ae1e63cc046fba667f30a058879b3",
    "signature": "0xdd51f3436f205e63b0b3c77b95969d50e1d68f8a278456842bcd3f002851609501fe9b876c907d3b6ba4b16f83e5a2c8d4621be23680e7d05823812937a7a2ad1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}