{
  "manageEntity": {
    "action": "Save",
    "entityId": "480162771",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe171480f0af7b2c15d954f61449bdddd449f32179a5d272310f2044ce0031fa1",
    "signature": "0xde73a9af9ad42ef97ebb97bfefd8fbce6afdd4dbb0cf5846cbb955d49cc763a94496239cdd4ad5dc1b7b46f411ed90c7ba0ab1753c8f7ef297e5bb601f1609901b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}