{
  "manageEntity": {
    "action": "Save",
    "entityId": "613724783",
    "entityType": "Track",
    "nonce": "0xe37afa3bc6d8e3727eadfb748f68d631daa04c6c62d30526ddaa870ed930efd6",
    "signature": "0xc56ae4ce95c562668a2d5e1eab09e4ff66341d5971eaa24e37e31ba895379f7b676f82d8f656853febc182611847122945681ba95317f739aaee3b024f8469521b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}