{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7426509f75f79d1bcc1b1125293b093eccde90927c9bdf1772906f4acee6c274",
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    "signer": "0xb1Be95940418517Cec333a0EDc43ef8C49526D97",
    "userId": "880371333"
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}