{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x303fdf3bbfa499b00933a19d5162e6faac0c5b85a2aa2e1632bb4b241277c15f",
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    "signer": "0x147DEFd16b88242B34dCC21ac4C4e06004BBbcb2",
    "userId": "721077896"
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}