{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe382e9b720b3574eab60b80d944e365d3dfcb56de2aa219564bc320866e8752c",
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    "signer": "0xaab26F59Fc55058d200BC69aDF7cEDC164dDAEDb",
    "userId": "514089768"
  }
}