{
  "manageEntity": {
    "action": "Save",
    "entityId": "53575",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d4f565e2033e130b8bc3ffc3c717d85358a646fcfe018146143bf1544437972",
    "signature": "0xb537fd394d7e2af5956ee1547f0c6b8a5cc9bbc6b93d6b07a4bae4a9f07ad3761de5808ecec044771b5012256cf55e4a53fa76358c86818a96e5fda457cac7cc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}