{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x379d6eef858bb8ab65514c97481d4883ad014852c258874972fe7b1ff6885c8d",
    "signature": "0x04b4b4e7ecc217e411b3a20464f2d50c52a1b72ee0f4cf564e4d2fb5f96aea212c27e9b817fcd8ad8ada516390247b0037219adfa97225272db806b8995a11eb1c",
    "signer": "0x0598FC797642238bFb08593189CB8B4b21aFF411",
    "userId": "179352401"
  }
}