{
  "manageEntity": {
    "action": "Save",
    "entityId": "1178686580",
    "entityType": "Track",
    "nonce": "0xa1e8d23675c6371e294dc43eb18238ccc76826cacb3bce9a8fbc80b7e293f15b",
    "signature": "0x49330b6b3c6ed21be9e1ecdebc7d6419e4cd1b96ab6f6fe1a8237fc67da3de7f17432a95affbe0abee6ecbe7f2d7910068a5a37d963aa4869e127f8333508d7c1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}