{
  "manageEntity": {
    "action": "Save",
    "entityId": "53938335",
    "entityType": "Track",
    "nonce": "0x5a1a2ce6420e96d8c9ccd8ffaf367b85071502bd1e6c522729e8e0b25d94f56c",
    "signature": "0x6a16ded4e8e766579c90b97107a6f3586597b3c2e38e744f5fa3bdb402308700315320307902ad92e42e080ffa30fae21ba7f2979631f8d2bff63492bcefa2751b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}