{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1350122911",
    "entityType": "Track",
    "nonce": "0x2c3740faa414a827d78f287dc08106c07bd59d33495c5e37b174c3fc16f64633",
    "signature": "0x399069c5422b85b5ed170304bbf0e3b67ed7c37efb09eeaf27cbea99cde72bcb773f3adec5965708ae351792dd5abbebed8d9c11980210406eb0f6400211ff011b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}