{
  "manageEntity": {
    "action": "Save",
    "entityId": "537166",
    "entityType": "Track",
    "nonce": "0x644a0abac13c536015fa7dcff0fd0806075cf309ee749fdb444b600d92e26cb7",
    "signature": "0x60506d5da3e20c8eb34d90a1905538d6339eaea74e8481566eb25c5237a1c7043ad8001b52e98dbbe036ada50c753474f5c292c28410fc4fb6fd30eef90a86771c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}