{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5cbace640accf08cd0d28b9722e65da35ed6ae213ae2b5413ec1f673df302cc5",
    "signature": "0x90351bf4c0f5aa2edf78086027a45832016ae1a76b7aa7e76206f0cea2b398b83b708001e7729590b7f85ebc646d857671a9422c466b76b28b9f5679a73acd481c",
    "signer": "0xF6d7F4477a02a1b5D3fA0991F1af9807e510Aa93",
    "userId": "103534989"
  }
}