{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x50805794849724ce02bd1f85f0c61533270737fc771ab5fb86ed5bff0e4009d5",
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    "signer": "0x925631F424aC20FD207cb6E12010AA40C60fA2c2",
    "userId": "567684694"
  }
}