{
  "manageEntity": {
    "action": "Save",
    "entityId": "984568",
    "entityType": "Track",
    "nonce": "0xd9630e934a4dd62c9955e31c1a2e5fa8d140a173d63b041d532913b5ee45c2b4",
    "signature": "0x88b95200e8c587729efba47913e2a6013a5c809ee121a72ff941b954d0c349fb6eac63f5bc1df2dc6fbaf91b286dbccc2a61e83e66d46ab69c62743c767ef0c91b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}