{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb997a7ee5773ffa1a03160407b771d924f3bba3c2af88d1a23062f9523548209",
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    "signer": "0x2D77AD15826295E724e821675BFeb14ae5f205c6",
    "userId": "328090150"
  }
}