{
  "manageEntity": {
    "action": "Save",
    "entityId": "72207818",
    "entityType": "Track",
    "nonce": "0x2ca0d7e2ba7af1a9d1fbee5562a75a1c22e3c7e17d4b74a9680352a467a871b6",
    "signature": "0x4779713a30bd7bf82e0ff3dd364613cd063c7e7cfa48aac2c78078d2a0d70c54358f5a717791266dd884785795784d5057148672e3a183ec019f10416676213b1b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}