{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc4c3a5992b9c3d1e889faee6824a3942cef71ed67eedffdc89bbf8ef8d71f1be",
    "signature": "0x4ffb68cb8017ceb4367757a9df09c283130c29e5fdf23a824350d02b88cce92d062cdaade311a86923c353a8c3fd8d04d636a0ceaddda2a531fdea26d2c579a21c",
    "signer": "0x7dFA279B83AA41779c5Bd05322c07fa0956A66b5",
    "userId": "869218053"
  }
}