{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4bd6162b31a1165afd31cdee15499a34de7657b8d8564f0293cef19a2073e8c8",
    "signature": "0xaeb460f9515986275526c8e93be3954a1b2b3ea56d117c9407da4a59059dab1941a1652b3d1c4562d6b282a604e9d9ab8bc71397472cc65ceedde5864aa9e8371c",
    "signer": "0x8a5278b17C6F2ee8453191e032DEe68c40ff7c8F",
    "userId": "265245002"
  }
}