{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742281603",
    "entityType": "Track",
    "nonce": "0xf0632d27feca8af70ca5fe6c8b1528a68270e58d82b4eca83f9c6310bfa699ff",
    "signature": "0xc2ddee3d6b0a3454a2269bf75950cf51f064a79b78daf38caeb08e3cd664410d71174dc4754376b4bb764c84e7f2f927179eda68b79674c7ce9ad8daa0aec6801c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}