{
  "manageEntity": {
    "action": "Save",
    "entityId": "1707569707",
    "entityType": "Track",
    "nonce": "0xa6f8cb66c24077f3a36678adb3094869931f44f9cf68bc64c715a910aeccdf80",
    "signature": "0x8016121cbf4ec23fe6f8f268b6111308585f2f2a8253471cfd368d710310845e44a4adc7553e0d6b0d4cab5e175fba41d98707f06b574eff96b32b49b4eca44f1c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}