{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x092ac7ab9a9e166854d4631d01b37e3b829f10601153cb6de604ad1022d9a1e5",
    "signature": "0xa55c093b81005fbba4a05a22e2af76c2389e8e107521aac596aab84bbd5e06b1270adc13b6e86213f8a7d3ca71f2bee09ce1b1aa5381402085448eba3f5256de1b",
    "signer": "0x75Ac175898ba822E3976AECA46a68b5ebC237781",
    "userId": "660992790"
  }
}