{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05897e8e54807ebea76cc21ab53930914cbd0d7e533c5b01bef267008187f0e5",
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    "signer": "0xE5440368BA70072e0f2F619C2f0451aAf6C2c0E5",
    "userId": "331800435"
  }
}