{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "464964584",
    "entityType": "Track",
    "nonce": "0x3ba490b54ba38c3d9c75174fd61eb22e83a8a1936452dc37bacc983af3d81d3f",
    "signature": "0xa910d5fe5e3e464cd6ffd032a04a877ad3fa0d569464f8cbf6d7de8218535f13321e9d501a4b3a4d8c032d1ac6fd9af0d7148e8bd4da15595706034da94bab951c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}