{
  "manageEntity": {
    "action": "Save",
    "entityId": "710344329",
    "entityType": "Track",
    "nonce": "0x1afa20d24f45c5b592bb4383eb810a11239062d716055186f45ae2515ac77668",
    "signature": "0x8818ea1359bcd5d29ce95d00ada36d4d296ac05471561fb18e35048952a854cf71fb05f9cf8afefac353dc0d2a12a28042604375f9660419a67df7ed6bc455191c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}