{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908947024",
    "entityType": "Track",
    "nonce": "0x05e9aa4d4125d2867c9897b27b2c2e9fb9b0ddc4007d5c88a839136db28ea01d",
    "signature": "0xe33144a8706298a7785172e53abb0035ba75c74ac3a18b25b954d2289f98666c1dcd00e0f23c322d9371b48f20ba12f037cd8e4bb3d701f099b346a4146768631b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}