{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbc11d1685f7d19c4c1fd4d0cb6b4963106bde5104731df59441f5177f3bed54d",
    "signature": "0x5303eba17756a281518a0683d45fff818f842fa16d77434abe779cc7cd935e0a7044ac3963024ac2e93a18ce7a369ae20ea50e31d7abf385f8cb7ff8f87fbe701c",
    "signer": "0xdA708531501D4f46C162eDBca1D759CB6e7447c4",
    "userId": "985405611"
  }
}