{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa2bc55729468e2f9fa819744a0cbb3aa44df0e3e40020aa4974476bc3a3dd26b",
    "signature": "0x6d63ce63e8d360cf7ffe8a138fc971902885c4e86f9c1eea02f8e767f179c16e3b5601dc0f36bc3f5065b3e144667e9e2093e806733d9266cc45ed637e75dc771c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}