{
  "manageEntity": {
    "action": "Save",
    "entityId": "886455338",
    "entityType": "Track",
    "nonce": "0x80a25227d2eb53d39156972a851cfb0aced1470c98f57f2667c3919e085f41a5",
    "signature": "0x527b3bae0df56b13388777089f1f191d56e734080ef4064ed8faf68b091f3b9f69c6271d1613a6ce6c000df975df3fadc07445f473135019e56c3b5c4658b14a1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}