{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4367d3fb0badd3dbd11e9c6127a9e8efa0bd8396b598aa24960b86eb67acd5b9",
    "signature": "0x0b05cbd4aa08c582c75204baeff48b03839f891f766720ddf1d8355f5a8c3dd57fae57b566eedf665bbef9334273bf756186cae2cf8c2b457b973b9287192fca1c",
    "signer": "0x2eA9910225b42325141E07393dcb8EcD23cFE476",
    "userId": "583935849"
  }
}