{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7885c6021daad13b685ce8be43c9dd7e6f73763c6efba18350dc5de28fddf265",
    "signature": "0x3fcbb84eb15573b2abe03532f8bfae13f6badb38cc22d7f0a0969b45d630e3521431910ca4a4e3b35a1bbc1c8612c4b2773a7f0ae2b69fe98c67ddeae2b1aa631c",
    "signer": "0xB0C77B347984348419AC789E91BA06E543EA1fBB",
    "userId": "110993204"
  }
}