{
  "manageEntity": {
    "action": "Save",
    "entityId": "954476",
    "entityType": "Track",
    "nonce": "0x4fc5796ab4b28b17809483998525a9bd602e9f26e054f36f4c995a3af3502da0",
    "signature": "0x4930ef69783a36623d41347674129831fd04fbe077ffc7abb776caacf9e94f5a5f8c265a4bddc328f7b9112002e9df67e5c63d6ee6dfc6a8e0970cada62525d21c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}