{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98c24c28ba41e95aab1815bcb9090015e6116b8cd85aac7c746963a426378005",
    "signature": "0xce7d4dc12bc6a885f9ddc56f76879a54c9438cc50e51e0717774d33388180bb84d3538403c43bdbd6523481fa4f800ca8023e591dd7c837c1786bc701179d28c1b",
    "signer": "0x5B015c5c293d7d025c903e2803A3bB7AAD0F39Fa",
    "userId": "41107270"
  }
}