{
  "manageEntity": {
    "action": "Save",
    "entityId": "278520679",
    "entityType": "Track",
    "nonce": "0x75b5150319255bd560fd9da16f18f8ab914947c1c888508607a751b82006b853",
    "signature": "0x63d7a4e14e1cc89b37980e594aeef9ae2a999d70ae4715164e216898f51fcb09791f4f097a46cb7addcd0fd51e8bdadc190ffa4c0938949757b8badbe7cbe7f11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}