{
"manageEntity": {
"action": "Save",
"entityId": "745343369",
"entityType": "Playlist",
"metadata": "{\"is_save_of_repost\":false}",
"nonce": "0x07bcd7a52a97d1451985f284d8c02d5da67711cfe4e5294542f94ca1f4ca4d6d",
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"signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
"userId": "490478463"
}
}