{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe5d16280e790c86b5e51ab10e17a689396a076901cf83fd15831952afae68c7a",
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    "signer": "0xC462a914958022Fe9eca3394279c78deDcfED030",
    "userId": "158581606"
  }
}