{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25b4fe7a20220300421633c655e1817925f485be653bff74a7cc657e3d4db9d3",
    "signature": "0x8972d13f583d24f28f73d5dc6a52b86765e34d188afc7a38027d616653ada3085edf787ba151bcc183660c0fb1ae721170701dabc07ffe8739beb24fbf894ee71b",
    "signer": "0x8bf0dC9fa6Ad8F832405194cB45F23cedA3e9486",
    "userId": "234632837"
  }
}