{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x66c1d6f217a32f89b891ced753e7e3b0aacdcb29612c6f10f541531ebf197cfc",
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    "signer": "0xCe924ffd53D86Dbef0C2Ff14D8363469048BbA5F",
    "userId": "758403941"
  }
}