{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x013e2011261a6782c3cd8b0696a34e67549ba0eebeb2fc30e198f203941e357f",
    "signature": "0x95bd12c9babaed9b6ca9d3db186a13e51033f49586779c088d90e7b40dcc8df928a83392081cb4e5d62307d2a7f340dc5be1bee55e06533df57acfc12d3985d71c",
    "signer": "0x5440c29276C58761A1C9fac1CF686DACF3AF49b0",
    "userId": "734659738"
  }
}