{
  "manageEntity": {
    "action": "Save",
    "entityId": "13042",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f3846cf8d20baa3c7b426ad3815acd6849e48dcf68215e771882d7374fb93ed",
    "signature": "0x97b3a2e6d2c95ffa506859e619e922324f6049b7b8dfe0a2a2b3d21c68a1c8e42a2fe814b72c54dcbfb0707df1bebac565c117688de4f9c0383c5ea17baf6c151b",
    "signer": "0x78bDC2F059DaA68F1424A1539Ce38d5C83d8DD4c",
    "userId": "4686"
  }
}