{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105214",
    "entityType": "Track",
    "nonce": "0x7002b04d4001b07b287eb2298d0b30fde14915c46345b9c6d665888a2036f296",
    "signature": "0x910be4290a309223fc0199cac982023d6e48f0b2fbfb4893a35a3b948a94a0402fa4fda8858b2b6aef1abf25321566903a98d370cb4eccc95ee86621eeb23b931c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}