{
  "manageEntity": {
    "action": "Save",
    "entityId": "1113593040",
    "entityType": "Track",
    "nonce": "0x7d422a4ad827721fabfaf058e401b973de6df6a90d4feb68b56df22f1b41c1bd",
    "signature": "0x68509d8004cace26d7325ebed4b609d3bb5764c993b605f74ba2946b552be66317f06a8610547ff2bf7145acd3fbdff22777e40f84601ad331a299d8fdb55e311c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}