{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf64d19a8349d3d39fe737dc1f00151715715b9d2791904caaf7422a3dbf1ae3b",
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    "signer": "0x3a60721a21f3BDbd14c4453F35a557c3722Eb856",
    "userId": "823541067"
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}