{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "776080010",
    "entityType": "Track",
    "nonce": "0x610e828a40a7b4c6d4c44d9ca3262345965ac95d92aadf5a20a5170c63722c9d",
    "signature": "0x2d568bfd5d3beb9d998d04b609e761dbe9569541c7db9a880cd0b89cf2bfb43c1e8f645ab2e6f3be92fb7d5d15901cf5caba64c786631e0c5353c897e533598c1b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}