{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0329ea1535b54481bf5c3d9a5cbed6ab6d96708ab01340f3d3dbc4e6990915f",
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    "signer": "0xa8b44068A4C55AeD58458160E334DB91E5d88320",
    "userId": "309988528"
  }
}