{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "874812864",
    "entityType": "Track",
    "nonce": "0x3d1631cc12c178b83394a93f1d06882ff655199d72e3c19e04275153768f8a6a",
    "signature": "0x50d498780329388c05499d6b7bcad61b90aac871af889449b20f9c1f0eb0a267073b7cc1f7dfab0806f89399d157f3057b64524c627a835afd959ab0da13327f1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}