{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7b00624d062c874cc97f79b8b4239a47095173d8292198da53c4167dd32190e",
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    "signer": "0x7B8c93608c2a10ffa54F76CDc983b1DC5Bbd0b05",
    "userId": "177113250"
  }
}