{
  "manageEntity": {
    "action": "Save",
    "entityId": "137516476",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34e71baab67102bc70a48a558a717e239f556f279f9701a16bc4f6f76306cbdc",
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    "signer": "0xff61C2F581c4C2d8Dd7096dd6f44505117256C6e",
    "userId": "695559277"
  }
}