{
  "manageEntity": {
    "action": "Save",
    "entityId": "172740",
    "entityType": "Track",
    "nonce": "0x601665d671ca8771fa43e6b2e08202cff10882e043107204e742c6d894aa637a",
    "signature": "0x9a8d0cba05a7cc0ea76df3bdb90bf44aaee4b86e7a550189cde4fcdff91c75d40d9739c417d4c765fa9ecae3c794f11200dbfa3c1ef941832e5f0ec1b760096d1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}