{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216684482",
    "entityType": "Track",
    "nonce": "0xb5df648033c299931b286a0ca4ca38370590a0810bb55108d794d8e683da9a8f",
    "signature": "0x48e748a586c8020acf7b3f1de62fb1969ea8b92efd9eba386b503bb6aef21f1c7fbc4f1be515a069dbe8f443b9346f9d33063ea831a86f203c393dfd742adb531b",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}