{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2082cc7afef147b7403444f161a67c1725ffa77aa5aa3529eccf848c0f01806b",
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    "signer": "0x0B832af42f443fC158Fec4338b2b5B2Fd996dB2f",
    "userId": "250760011"
  }
}