{
  "manageEntity": {
    "action": "Save",
    "entityId": "242906187",
    "entityType": "Track",
    "nonce": "0x9fb99a64d2c38fb6e83d390af1d120277287953f0aaf3262eaf3569b6b5c96ab",
    "signature": "0x200455748baf656d399c220ada8c8e7f452285e7dfabbb7fcdcc5b505936b6c40d1c183938c2ebbccc16bf5b739929a69ecd4cfd8d8fb7ef4dabccac70ccd7751c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}