{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc2b6a55f73c1caef4a8bcdee3e0ebf44846541bb90f5ff6ef473936f3073a99b",
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    "signer": "0xdC840A61774b0850116f9705f191a4c8E39C3905",
    "userId": "860375571"
  }
}