{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd51f630cecbed2452debe443cceed0515b1e5cd3afbb41735dabb17fda4422a",
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    "signer": "0xF7b51CB106169c42649Adfa4D792649E2b3D1902",
    "userId": "282103983"
  }
}