{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9bff0689744be6e1efddaaba352e10f1bc2289d0721d92a61a9ef279d9ca02e4",
    "signature": "0x58adb8969cd776ecfedcafb401cec79ebcf9d7f27a48ae6050d641f05d691da35337d527990fdf84f42303e610f6c3c7b6314142a2058aedf3c40373ae48d8cb1b",
    "signer": "0x4C413aA16AB0452da796Af095ae4D4C4B82F5f32",
    "userId": "44882442"
  }
}