{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2b9caed27251c39373f3e8fb038a55b64fb72561ca82f401eaee73859d2e286a",
    "signature": "0x604956e865c133bb1c0d3ca90b3da5ec6606c68e5bbf7022c79fb8a1a5e2da400e56426ce1455645ebfbb4180aaafd46cb5e5f7c6fb3739a0f8fd155731bcc591b",
    "signer": "0xeaAD55Bb8d3e66AB4a3118b0A4C3b0d0A50f3559",
    "userId": "810725498"
  }
}