{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe08eccddc62581a5816321234ef3f7900fe984712032c8010e57a86e527da869",
    "signature": "0x1d0b735af9c95c1bcf78f4c0e6eb65d226a5e524c594b479358b74ff9c96b61b0956576e41bc73d318014c8b745cb0c2517570159e980dce79b94ff2de4b98c91b",
    "signer": "0x83e18d8f2181D38D405A623A4967ef20C4A7f056",
    "userId": "122609938"
  }
}