{
  "manageEntity": {
    "action": "Save",
    "entityId": "978202532",
    "entityType": "Track",
    "nonce": "0x2f8f801a75ca05882a5760cdbd5db8f3b27fc726adbec00bea46fa6b40a849c3",
    "signature": "0x7c9ba585239b9d534cd5e8eb438cd10c0a80277f476fd1b6581269c4d07098a64528f694cd5c930660f6ed73e93dba31cf2c2ed01244c67f4d4324b52fa610661b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}