{
  "manageEntity": {
    "action": "Save",
    "entityId": "293561562",
    "entityType": "Track",
    "nonce": "0xad9776b8630a60a835194e2a5f671e61e1bf2b8bd1c67c0c251b39fd2f5871b4",
    "signature": "0xab75fb49d2eb2be6a92ef5e392a1ec2ab63cca9a5fd2283a38c964afd4e539e6129cedaf513d7c4b29373913c9e461d97defe4a14a21d8d9cbe6b5f20328535d1b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}