{
  "manageEntity": {
    "action": "Save",
    "entityId": "947691011",
    "entityType": "Track",
    "nonce": "0x395a36eca52bd79684b8dd24416492bd3f9f70d31f84fe8975db5e30b1982376",
    "signature": "0xc586b27de9d9fea080c3e1599fc3be2c3bfab3c148eab40c45e1a94d817df9fb69b8912fad1fbee07a1e03b3b5bc3d1adfe5166eb8122506a762a7ffa48534031c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}