{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63884dedd37c56d0d4e82cf5300f212b38e9a234f41860d983ba3c1e1205fdf4",
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    "signer": "0x9F3Bf79c6fEa03d18d5be4674830b152D12Bd7Ff",
    "userId": "527791598"
  }
}