{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb870082945a839b6dc4088fd02fbd6a2e45e6f2f219d97547efc49aa24b830ad",
    "signature": "0x66b2da5578dce86c8a83af7d67e981c062ed0578587b7dc279b59eb1bc50355523dd7c9177d9125a02cdcae29b9e0e669df702a461cd380bf7b4ff8bff43608c1c",
    "signer": "0xe826518A8116188747A2839cB92D580ed85da7AC",
    "userId": "638301639"
  }
}