{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401202293",
    "entityType": "Track",
    "nonce": "0x90746ae3903c8fff38c7030642b7407740e30c8d402c8f4b2a4e89d182f48645",
    "signature": "0x0c44fb26f8ff8add87e1606aa804127d22b822c76bfef88e37ddd380eb86d8c73eff9287fdfde9e396356fd8946ef1858d666ad7986cdb99ad9dc6c413117d1d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}