{
  "manageEntity": {
    "action": "Save",
    "entityId": "5138",
    "entityType": "Track",
    "nonce": "0x12c249b4fbe8f9bb69f72a0a4b15ac548285a7633217df13a1e973f3279e7fc4",
    "signature": "0xe0d4e8365ae09efe90f354197364186aeb1097171bae3e9e09c6328ea03dbef760611bf86e7a8648539a49883521c87ab0b4e43751e867490de1652278a3ea041b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}