{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xae9cab67c46919ccb9e609340cf601e2428e563b3f7fba991a0132c88bfcd62a",
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    "signer": "0xa82aB33d5e5092dc02879392Ca32f4B0a4E84963",
    "userId": "595635275"
  }
}