{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5e81b6639204d43b44000b5e2f232b5e57cf972ad52b035905cc5f6d02457ec",
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    "signer": "0x965d76a662ebC730ea659E220285533F8FD73608",
    "userId": "253077004"
  }
}