{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "931538",
    "entityType": "Track",
    "nonce": "0x783d953527510b4d95dce877008a7c18bd41028a8a07030242564b153183a814",
    "signature": "0x1177bcf3d41e05b338b9ce0a378a53851ed0455c7f6a8ad59e2185b78a8fff2345d72db4b9fb4c11a1c28a1fe9ac1adbed82df5b7673d96b5a5a047768658d171b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}