{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "222456",
    "entityType": "Track",
    "nonce": "0x5b311d43df8579750dbc2bf07e82dfa95a5d74554fd6393875eb4960b89c604c",
    "signature": "0x6bc9e1694f097b309a2dd9adb10bcdac46f8fd808ffb945c7a0b747cd6d4bfd055ea3e55234cdc3c170cdd5a8692ee8d2c98caa487f8cc78d707ce7d409229ed1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}