{
  "manageEntity": {
    "action": "Save",
    "entityId": "746612513",
    "entityType": "Track",
    "nonce": "0x6269ab33e6850f0f393d8378478f81664dbd91674a7d5ca2ff90ca45d8a6f307",
    "signature": "0x26a32c244dc45741aecc2fd7e4401513b6d08b79344c9491d74d15c92ba1f3e073f0e79c5e916fc1a7f7e040c7a353b2189ffb68042fcc1cab58ecfdfd682efa1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}