{
  "manageEntity": {
    "action": "Save",
    "entityId": "1432701641",
    "entityType": "Track",
    "nonce": "0x41b75b7c43f57e7de7de0896c2ca4635319de661b8ae120aaea30e47417d63d3",
    "signature": "0x4389572a2b6bd2618ee3aeea80a63f129837f2cfd28d586d56c15ba053b4fdeb15b047a06cb685b22ed0109cfc90657795bca4a941816ce649008c981fafc2bb1c",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}