{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac4898902a9ea97b13febd0e8999558e2426bc577fa87aec16554105accdb27d",
    "signature": "0x9e6d8e157b1431725f05ef38a12d0b6a8234d9b7ccff25260d61fdc69b653dc64d63790ee61d1ca3a568e0665c8f6d717661aadc9c44a218ad987ef22ce6dce41b",
    "signer": "0x808e1c66560cF36D00CA8D920af2D9205114a2C7",
    "userId": "983141272"
  }
}