{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda1637ec4346c96e4a4faf2c9a9f96552b4ad420c8db78dcd40b81ec5cf89f99",
    "signature": "0x56296f2471ca9fc7f4dca6460dd937a8c415669d0f024dc9cac2c3e231916e3f25d3afb31e8effcb29bbdd4823be771f2550cdcfd353be9ea0333fab8bede2001b",
    "signer": "0xAcB0d7BF9562f1b7E47e8B21B8977EEf64Fa901A",
    "userId": "524597900"
  }
}