{
  "manageEntity": {
    "action": "Save",
    "entityId": "206643",
    "entityType": "Track",
    "nonce": "0x0ff96910109f0adc01e47c27db2eb545afd6b18affe8c2d4c319b23bbcaca8eb",
    "signature": "0xab863b519d524f9a7d708ca746c6bc124187ecf3345682d1c8b1b6bee1279a3e1f7fe167afae8b8363ed0c588b422922692c98df82ceae7cf01f54027c92041b1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}