{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc87c91b49312a0b8ba454ea8acbf7db24bf2eef19d37d47d031b8c578f92305c",
    "signature": "0x803d66f8b4f924f294bcd29314c32040b21b382b280f65de4a067e2c61645f231546390b1c8f9b17b3127439b9bd8d8491bc10daa723911db824c7f344b00aa91c",
    "signer": "0x9A1A483b8f4450Bf43992f98248c0567cFE557B9",
    "userId": "126704903"
  }
}