{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988085541",
    "entityType": "Track",
    "nonce": "0x1cd449f6bed4c245a100f86c6e0ee8b33089a1156ac720cf432ee7686f8e71ea",
    "signature": "0x8da187f7a5be42e846035dce11d0a6a97d864e7b86ac67a161d0b6a1b26a9fb3588c54c1e8b42aef7327822fc51eb8a5a7496e5d0c054806f5add3157ddc400f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}