{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63025e3dfb0e35d7177a7ea31fab90a07463448fb0f0d862935470683ffbd075",
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    "signer": "0x122c01b892B30716dB16F0430B2F694593cc171D",
    "userId": "967763751"
  }
}