{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x60b1813676f20ea7b511366f8a6351b0c0cd14ad427fb3c0314139fca8b2ca73",
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    "signer": "0x5b8BFea922d3E94c01D9b58040d1Cb4E8BE244EF",
    "userId": "154085595"
  }
}