{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020305477",
    "entityType": "Track",
    "nonce": "0x557365beecb0c3b62cb5e8ca6e070ff07ddac4eac631b76941bbd25cf6c25324",
    "signature": "0xec91c491f47c9257d8fd15aa13d5a94faa54bf00c96eaa0a26abae3839c4791260b79ec853bdd562a8b1e43e624a69dd5b19af7189fdc462807352ba7a54b9021c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}