{
  "manageEntity": {
    "action": "Save",
    "entityId": "780166509",
    "entityType": "Track",
    "nonce": "0x85d5068fce3348c87fc8668f6fd8677bebb1cbad9b8fe187ef69baa4085747ab",
    "signature": "0x2b383ebecb4b4fa5c30036a5666b2d9e4262e364a06e01cec7aeeeab4c8eb3006a7ea713b6f56ef131e2364526bdc32d2011ed14210d81024b7be684fe3a914f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}