{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0eb3d1585572b6e5b9475c5ab976a771d3cc866b19248b1e94c510174d7cc1e2",
    "signature": "0xfdaf33cf92b528f2753137e93d7429b448879b511b18dcdb0d9ddadd3427dbb060aa0ac4e4d5b8ed599cec4ef168448bbdabc239df15af95ef3d484fcefc5d7d1c",
    "signer": "0x75E4B0AF28F84629E6Bdaf40E9d26Fad48f00cE1",
    "userId": "783920934"
  }
}