{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb433df618d2cd73c523312b45400bb89bc48812c43c1bbe3140f511dca191eb0",
    "signature": "0xf6ce09333071c71a6eb1535874d3bc017f83e452e4e28a8be95858b60b3e16787e76db886d4fb5f6320dbf132c447d5ce94fa41bc4077bd47ed422ccab4cd99c1c",
    "signer": "0xe8BAaf9d67869BFe993951C60524b67BC331bac9",
    "userId": "75683930"
  }
}