{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487121117",
    "entityType": "Track",
    "nonce": "0x5eadaf3657302c2456ff5cf88cf852c0617fbf22c708c45dada3f459440ca294",
    "signature": "0x803d89b8202405ddd0d3c9a6d58834fffc88a5fb8da7aae730f384042eb5b07a3a80fb3862ec970cd49b3eb1bb2a38fcf365b49d0e9579fc095a4800212a61061c",
    "signer": "0xca7c61d7Db568b81B8A952B917F45dd863B736F1",
    "userId": "144109"
  }
}