{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x51a557f7d52aa9c02e728dd480880eba6f14fcab374289c420b2b4d5f72574b7",
    "signature": "0xeb84cc0d4461bc65b953c38c2f10ebb68485a5891aa7b2dbc6f8eb03568b30f60eb3209810797fe4ea32cbd2de72a4460020aa3c153b8073870c8a42643ea3fc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}