{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0f95e04e270322310cfe6b52ea9eecb0eac292834550cd0a732081c302a417c",
    "signature": "0x3497115215a3c83b2d19ecb45bc3dbbfea5f84e553800475baf2d7eef1832dfc70e9e5d1eb40b20bccc0e2d44cebbc8dc565a7294b625d2d3333008a0a263c931b",
    "signer": "0x63d394E88B78FF653F4FCeB0AC74Cf5b064dfC34",
    "userId": "633246973"
  }
}