{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x52be1fb2ff8307abdbc261d1ca67f95ed74525148a8c4862c5f0983de2620a03",
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    "signer": "0x812B7A80dd633A71317D6686237dBdB80B36B2f5",
    "userId": "160012753"
  }
}