{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396824653",
    "entityType": "Track",
    "nonce": "0xca6eb6b363004d4bec98b0ea25671ffe4bd51030f9f9683f257da21a8c6bd125",
    "signature": "0x2fef09326694b2a645fbf67e3cdd628244d3ab8401d3cb5f9a1641d9d7e992f1782d4c04de955d9a7bf0a6abaa0f3463ddf9df48afed9bd6c880f4deba4fdf541c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}