{
  "manageEntity": {
    "action": "Save",
    "entityId": "712390613",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9db0a3ce896e9c041cfebc41bd6d2914b6733ef9f08d155ce67dd62027aad462",
    "signature": "0xa353dccf36245d45a14a43558105117b54a0025be34c2d022c1264f3369a0eeb4a82a5e15df244285d444a67e43057b3ca296f46e8acb4305cbf67db1245b1da1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}