{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ff0c96a56da2fb0aaeeb0d8a2b47c05d2a12f66cd8864f2f239709dc951b1c0",
    "signature": "0x190b78af1a5e016b5cb435e13f884ea9358b18dbf4c52bb1b0949dfef8136ca333888b866a8ed98ac652b558ebb28d868bd8d50d314d86b00391c8e73da177ef1b",
    "signer": "0x6fAD04D38FbC1C81E6C2007cffCa1A7520b7DCFB",
    "userId": "406552185"
  }
}