{
  "manageEntity": {
    "action": "Save",
    "entityId": "807540133",
    "entityType": "Track",
    "nonce": "0xa590a0626a29e35b84588851a5dbfe5a4505af2b056358261c3b49f0d5fa1ad9",
    "signature": "0x9499aecded3674213108e68601300f03c4eac4f36249858472c6972a9352be3749ed034995c079ec068941412261398890d9e6d2243ae937a37613e0923f91ce1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}