{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462345374",
    "entityType": "Track",
    "nonce": "0x69bfd6be15ef1e9a6dac5d87360b96df8b922d4270e5f972c954356015b58f5b",
    "signature": "0x578fbe94ff25c9a2b3dde82198114ca206513498917984b6f13836e89152cca7033204aaad219c6f51b37a8a6b58cc42cce3a26d0d1bfbf9a955d80050c47bc91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}