{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92e216b97262a30def746aefbddde56d689112f064b9b5778c9a7de9be7b49bf",
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    "signer": "0x54ac7C3663316Ac940EA1Cfd1FAB49024eE24156",
    "userId": "486383100"
  }
}