{
  "manageEntity": {
    "action": "Save",
    "entityId": "426983371",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb91fc6e4ef8c2c04e4bbeb7228d3961f3ee64f8fc0cccab254d830bbbae8b063",
    "signature": "0x73bf6c50f0e488793dda6dabbe15b782371a3b1574174d1a0cac1ae22ef106ec4786d02e7b719cc25cab88bc537eb77835a1fc699000669917c6dd1aecef0c6e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}