{
  "manageEntity": {
    "action": "Save",
    "entityId": "918015704",
    "entityType": "Track",
    "nonce": "0x317f4f1836d49537604d4f2c11d4492aee4c9fb4b7ea5f3d5027c6dc0e779177",
    "signature": "0x032cd38d99d850c645f46c0cdc16d3d854ff8dbf4f5e57e9d190d539e4833c4b1781aa2794fe5cbab6b179021866e73e9cea020da15802635103301e4a3eb6711b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}