{
  "manageEntity": {
    "action": "Save",
    "entityId": "957155",
    "entityType": "Track",
    "nonce": "0xb99ab0558c6f62caced8d14c223aff0fab7310f2c0e48971a4386385c0006aa5",
    "signature": "0xbf9473abee7e65cb2ec084024067e2aad86ed25d78acf70fea161c7c7ccf1f0f1a5338dcc71a676666f47a5bdc378015fde4df9a87a016c4ac23f9cb5143c7751b",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}