{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xae6b1aebcc507ced258fd8707740feb979439ef1bf6c81a24c2f27b4f94586b0",
    "signature": "0x8f64295e24a7ad256542c0122491d9a4f3dcae0fd1a49ffd988d6cf35f88915e49fd137909eb21955804bc5a54d880d9860d7b5e689400e9f9fa4ff436dac64a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}