{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1247350aea7a0f2ba4717f777cc43890b78a2a006524f0acc1be7e62adc575fc",
    "signature": "0x40f8bdcf39819ba221be7767bcf75a9cf766f6d962a5867ac9fb12ae4c98d054283dca6517a27a6f6035a35aa336885a0e0d47e417341bdc1181debfc31be84a1c",
    "signer": "0xaa30036cA70a35e92eD983dba4e290a2220Eb8da",
    "userId": "544460047"
  }
}