{
  "manageEntity": {
    "action": "Save",
    "entityId": "1506781172",
    "entityType": "Track",
    "nonce": "0x070cc848e237230f3b916a373d4cc3b618cd85f97d989a47b51b15f72053505c",
    "signature": "0x92b6eb574c7197bedf82199b4a4e614a5c754589511bef9757d7a70cbe705b8c6110c85a14215189ebefa22a7562571797f5ce6e7632cae289647bf0a77404801c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}