{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf5f6d231a6821eeb9cd66b1e956eef1146c625e219aa2267043fd278de25c344",
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    "signer": "0x4e7Ff4DA511194F865D82936Ed0b8fB40B5B9741",
    "userId": "582626597"
  }
}