{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "730626384",
    "entityType": "Track",
    "nonce": "0xdd38e3ed57b9862d77f4d1d254d2c1801862c1de21e920b833581ca1338406b5",
    "signature": "0x7792d8b4907fd46e49d4cd2e27eb517ae460891b1fa755999de75d8eb52d05a4306bd3a1d4602d9687566f5aa2e9784fc25eeb910d48cb0a9dcaadd0c1c418ee1b",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}