{
  "manageEntity": {
    "action": "Save",
    "entityId": "90470775",
    "entityType": "Track",
    "nonce": "0xf24dcfc970644c7ce942bc97449c58a893d321a3261e8146a46a2f65e5731979",
    "signature": "0x8e916102d969c9d100187dcb13f99de2680177be13873f5216b52448da2f61da7245663871f806ce110de2ddf9afb0e9c0a5986b8b0d6854bd4b90be51c531191b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}