{
  "manageEntity": {
    "action": "Save",
    "entityId": "1641033744",
    "entityType": "Track",
    "nonce": "0xafd257b06b6128b51bd0d5c28c83134b9ad8f0297689780201fd7020a2500b76",
    "signature": "0xe013963ad39fa3b84d23c7ab3ccae3a71e3952a0b960ee66866c896cd7fcf0af14b9d3e3f202880c58dea8a2bb09cfecef66bc1a5ff6382e76245f557a9c10e51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}