{
  "manageEntity": {
    "action": "Save",
    "entityId": "184565846",
    "entityType": "Track",
    "nonce": "0xf8ecd4c837080ccc9cb3a4ab1bf745dcfe205f3a5b25897cd9f46d604dd3b466",
    "signature": "0x0803569747d77f6e98249a16981be22afd07b0078ba86d5300ba61f3e3f2691a5727e130ed0f8682ddbbf98b656bd9d62969320253618a6208f0d1e39be4fbf91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}