{
  "manageEntity": {
    "action": "Save",
    "entityId": "565803831",
    "entityType": "Track",
    "nonce": "0x7666babee62b7e8fc0d48dd1c67071b59f1ad2e710c98a88d4696418f587e10e",
    "signature": "0xd4c751032450d2fde1cbfa04da75027100d3e6784900e5a812f1746d077f0041019acf455b5bfcce16039fefb1395b40cf84bf5c17d60e1a5018735b373f25a81c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}