{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850826509",
    "entityType": "Track",
    "nonce": "0x03ad43dbf2cf9b5bb54bdd951100f64fe9a385b9ed4c59f712e9f318ee91ac04",
    "signature": "0xd16b046947290c5a1894993a0fa03b28d8060e20bce1f2e9669dbd08efe509c37feb4b9ced1e8ea8f3bfd53a6ffb1c124308f70977f3b2f2df7b0bf7e3c3685d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}