{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xadc39fd0e14e20b935018244f55c8f701b515d6195d5ff62eba589e1330ab68a",
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    "signer": "0x26e5edB5490F2Fa4897626dD634f29302117aa7f",
    "userId": "521699858"
  }
}