{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5b2dfcb771588e97f8aa150f40d3bb184dc45007bbe0c386b15da1ad5d6fb81d",
    "signature": "0xacd7b2191edbfc302ae004e0c4ceab846b336d99475f13ca4c94569b8317a6730161af33f8170362bca8085a31555c46f9df2470de7eabcd910bc18d757559ee1c",
    "signer": "0x8700074A90b1Add14Fb38791e36835F07f5992D5",
    "userId": "875047146"
  }
}