{
  "manageEntity": {
    "action": "Save",
    "entityId": "803100815",
    "entityType": "Track",
    "nonce": "0x2206df73a8d952becd4bc75e9c402821273c3053940d87053b4049ce6a508dd8",
    "signature": "0xf0a76b92139bbd273ed7feacb3d4405d9cfc8cfd998804ac0a0abb38c11710b903ec6a50cf7eecc71673a1b49e381f25bbe699777a5db8bc66826154670284301c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}