{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7eef669d616320e331aeb6295d81b1bc99fdaa9a89f2974ae426c680ae7c79f6",
    "signature": "0x5454561d8aae601a400ce319e4a26eaebb5277113481eb115fa46f247682351b60b7781fed20bafe1701ea652979f506c31fe0504156f2a6cb5120ca192677f01b",
    "signer": "0x411178C64b26B7a9ffcc3D04ba12241Ca69b4484",
    "userId": "758222405"
  }
}