{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe981eeb7b698f3ce7a2a14a3de36cab9ffe82ac77ff8d1d667e516f8e1b331ca",
    "signature": "0x9c1314ae67de037f208234ea07c824a44b5a79045a96fb68e4ac7f22e677399759d8246a53ecb5e3e2313dac00ee802d09ef8fc9e1718591ba0dbb0bcca360561b",
    "signer": "0xdE63b4988BeFAfA6DA439B1A19b5d3B2a000A05e",
    "userId": "487437002"
  }
}