{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x59be2df8dffa88ead031a9eb54aba4f95b91f68006c9c999a4d95f543a45d193",
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    "signer": "0xCD4f3acb025d66e38B68db83105d705Bd7D2311b",
    "userId": "26063741"
  }
}