{
  "manageEntity": {
    "action": "Save",
    "entityId": "99472394",
    "entityType": "Track",
    "nonce": "0xbdf7b5a7373caf873764fefec557175731b149313dd9b466d3e80ff1da933b79",
    "signature": "0xe90f4192b53bb796b2e58251cd4689fc9e7651d6611fadd376ecd4de8c3d20bb496292b95280519d97b4e46b9912ff2e6d71839143179c4b2e220b99e8e7246b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}