{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfd6f306de2eda125bd98b5fc84381fefb9e21e82833bed5291fe2577371e6c78",
    "signature": "0x41fe7a4f3a01c729ec2d8fe1cb3186c9d404cd33aa83080b72d04a556e876d3555b5fde946ee052a8932e20104f1f52f4e7b1f65bd3e529ff0410342e64e246f1c",
    "signer": "0x9E0BdC4AA94bB8416a2A99864181fA36c2da6d2d",
    "userId": "400892340"
  }
}