{
  "manageEntity": {
    "action": "Save",
    "entityId": "222049558",
    "entityType": "Track",
    "nonce": "0x9985e5b6869e00ab29bff4ee0a95d5601a6a2202c813b6877cb88517db7cef51",
    "signature": "0xa30aa8e3265b88347f491d241f10e2acba43a19af958326b9a6c9e5f274bc5253c1d461ad3e9015b7507a83d202a3a8d519d6ee8a71260a5216a40acbadbc7401b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}