{
  "manageEntity": {
    "action": "Save",
    "entityId": "565240227",
    "entityType": "Track",
    "nonce": "0x166aa36bce871db01e28683580481c5cf4af65b9a63eb4cf7616bd5916d00b7c",
    "signature": "0xe08e76c22c058fd7971b3cbafb6f6a308b90ba9592c682a3e3c15235829de51e10d8f1b4bcd3a8cbbe59e24ed4eb732f385f63c296c40bb9063e69ec1d10fba51c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}