{
  "manageEntity": {
    "action": "Save",
    "entityId": "217926854",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2f6190cfb8a74d8ef450e99617a5a3874805ccfe1c1bff4d1a1f2cdfb9e37f26",
    "signature": "0x7b7d91aaa33ad0ba6e261990aceb8b46413928d59ef2f96a6d19ee22f29c7da451e3ab7e5e086cc2647dd9fd5f6d5d1956759422e5c7978df005045969d373061c",
    "signer": "0xae90B21484a70AB481a9557D0F200B0eF6816264",
    "userId": "114402"
  }
}