{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8e2203ad1318effa49605882d1d8bf5fdd00f75dc2bdd1d12ac7f06035dff567",
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    "signer": "0x49c8368c064314c21EbfD798d8cc14C29035a34a",
    "userId": "720494104"
  }
}