{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00347040b3fc851a8fefd5bcca85599d09aaf6a1e61bf50c773bd79a38198282",
    "signature": "0x7593138b73246288041d0604064ca6ea9b4368378afcf6352935df93e432f0a35c56d6e7c2899a035114d4929ae6c0e46613ad36afdde02d9945b0d2fee28b681b",
    "signer": "0x79a6c805E8dc4103Ad75915eCa1dB9902271531d",
    "userId": "51770978"
  }
}