{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc81560508b81fa6e3e56f2ce4b81e8c36e235bf5fcbedab1ef7405ea778a8cd7",
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    "signer": "0x8D97512D0C3C35eAC4B44578a479bcd8266b68Ad",
    "userId": "503182302"
  }
}