{
  "manageEntity": {
    "action": "Save",
    "entityId": "766986476",
    "entityType": "Track",
    "nonce": "0x70caf8ee6513445c29eea65dd44775f24cd306c40f4da24fa111da45e46b0d2e",
    "signature": "0x4ed88b80aa6b57818c7756debefc534ac2c2fe13f65f998dd22f59ed3c33e7dc7e1642b8636af4505c5559c09abc6e63b2586ca176f2c193065bb78a7ed9302d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}