{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637084645",
    "entityType": "Track",
    "nonce": "0xf05ac1c4d5f037610be143b21dbc01616ce72891c938eaef1347ef1e83461971",
    "signature": "0x2b0db6de424eef83e4033ef0cf1622772502b1d08dd5276eef584e60fb493b2c07cd9da385288f30b9bc4e7c39ceb85e2da1561924980c9d808abeb0a7b7911a1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}