{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa34fb463547b346fa932405336324b3ef911767a5ec8d6c78dc2eea380a6e314",
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    "signer": "0x63aa846197bf6d5e49790af17177cdBf8D6bdFFc",
    "userId": "318105270"
  }
}