{
  "manageEntity": {
    "action": "Save",
    "entityId": "1191850726",
    "entityType": "Track",
    "nonce": "0xe8850a80f59603bdffbfea4a346fbc41226a4b30e2f57d74ff6cbbb33a77d92e",
    "signature": "0x879afc353829525d5afcba082df2fa94a38dcce7952ea7b9be8eaf78a82273c13ab057f27ed5425defb0306bb9cd010dd3aced6e4f6f0d101ec63eb7ff067e3e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}