{
  "manageEntity": {
    "action": "Save",
    "entityId": "223654690",
    "entityType": "Track",
    "nonce": "0x8e347dc08d30809f0296dfac4ed8ef0ea0f64b4975d4a10048f6ff2b9ada7c3c",
    "signature": "0xb61c69d111a3d5a57be22b529ba00ccb37be9e599693b3065d2bf8f2517fe47960c34819f6f5d99a04632376dbb900e858d1216befb5499800adf2988206ce9f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}