{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x370bf0a9b624efa68f8218d898fbf521672cd49b079ea5c8fa17d868ae5269aa",
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    "signer": "0x2d5255E59daDec716c1c5685EEE02807Da66526C",
    "userId": "746193289"
  }
}