{
"manageEntity": {
"action": "Save",
"entityId": "4281",
"entityType": "Playlist",
"metadata": "{\"is_save_of_repost\":false}",
"nonce": "0x7a9d1247fc747636935bd8d085f56574a2d184a1c0b2674339ccee1275086b37",
"signature": "0x06821cfd5e982d321305f08f3b7e1e6b79b9bfbc5fc1a297979dc2ce4e4dcd375c51caa6fc85764e876a448930aaf8ed40b2ff3ab5f212490fef7191ca516bb51c",
"signer": "0x7Db329A5E47004CEa691Ba8d1DE2cbE091De9745",
"userId": "911422900"
}
}