{
  "manageEntity": {
    "action": "Save",
    "entityId": "1233723198",
    "entityType": "Track",
    "nonce": "0xa59eadc142a3322be3dd937a0b1a2b5608f88e6fdd3cdcecaaadde8d506aa876",
    "signature": "0x4e6e39ed9c13f321449c149c4398310a37bbf3439f09bd2eccc15bbccca85ad1239ab717596ae2302c883add4badcf245bae909e07fa3182c2b05653ffa221821b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}