{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020381545",
    "entityType": "Track",
    "nonce": "0xb4876ee11c7e75de572b9629f8661aebfc3d90787432cc4ffc91533d95b6d510",
    "signature": "0xb1c548850403f108c890b2b6d67687c04885c70ec3d391b4160c8af37a20480670ea5228e7c31ff4e56998f542160562aa92a50dc5876516129c4619942cd2f01b",
    "signer": "0x67479063A246B10560F7FfC48Dba47268867417B",
    "userId": "745004514"
  }
}