{
  "manageEntity": {
    "action": "Save",
    "entityId": "87752675",
    "entityType": "Track",
    "nonce": "0x389bbebcd878d6ca3345a1503c22cfe6dd8252bbbc1629523ea8869e79b1e93b",
    "signature": "0xe9aa7e18b9f924e0503e06536c7fa9daf0a23eb4eab24728660fa154ba8c887424eb839fa08908458aaf9c4be88488b1163cf5426ab090b6c2ed65857aec57891c",
    "signer": "0x9881bA04eA95d8a4De5594aBC9DBd5c96F38eF34",
    "userId": "211307"
  }
}