{
  "manageEntity": {
    "action": "Save",
    "entityId": "114639",
    "entityType": "Track",
    "nonce": "0xe18389c5ebff6b09c686cb5eff7a070ef2425f860c0f76c3a04a94a18d929d8d",
    "signature": "0x3c981bdc5de645a56373bdcabaaad07c3784b5e94733736329dc67778a8f85a65e58e8f4b606855c6c98b7f427a55a84a56d46e89bff4be4735a0d9a2c673d1f1c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}