{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4504b6fbb7902abcb6bacdb962a965eab73a2079983d0b8ef4597956cb0454da",
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    "signer": "0x8B4234597381a86d88d9B7dd566254338c6a31D0",
    "userId": "276584815"
  }
}