{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019374",
    "entityType": "Track",
    "nonce": "0x84a0cd3916d4abfd8ded26b8adb59659c5d3081e79f986a5c8810848fb6c9ba7",
    "signature": "0xf0ee1478590025ebf97b321e411f4ba560ac3f6c8865ebfe68fe39d44df650db11cf5d7c66302e39af4ba1f7fa8a4c566a8a02d112b58257eaaa60382d251b8a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}