{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3cb26fa419610bf1fefb1c9412e1e251d8c74a5796157795561cb1b5fac84c3",
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    "signer": "0x46bBC98Ed2Bb60db98Be4656384ecE1958815fE3",
    "userId": "940200071"
  }
}