{
  "manageEntity": {
    "action": "Save",
    "entityId": "2057987642",
    "entityType": "Track",
    "nonce": "1792359020405820400",
    "signature": "0x03ffd7df74ea9fd5aaf6fc6f26025623ce74236007ddebca92ec0cf00292fd334dc2ea6869b7c1e5f550404674dd7ac6f54db39d6a2c027f21e43928b20343581b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}