{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9fc2bc48b69bf0907664df70d257d0c4219e1554f7f8a533474f7747a543865d",
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    "signer": "0xdCd3Dd7109F06BBc080AcdBD6B54bBae80AD4980",
    "userId": "455403640"
  }
}