{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb5a0ffed543eec78d9bb067e52680ef409172db0ee4965def0bf8a63c9af9a82",
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    "signer": "0x434E6E903F887d1123e2415651292ED71aC170Eb",
    "userId": "643976014"
  }
}