{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x045acca6e73bb7b2bcaf6c4707e5d2afebfd91f811061432d2fcd6a3001398c6",
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    "signer": "0xDF9352d1988F7140ad4167745251E23Fdb425be4",
    "userId": "323789212"
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}