{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82435e81f1474f2a5688fd0885a6181075bb1ab934f389f68d1e4d1441e8a51d",
    "signature": "0x459687cbd38408fd7f401c2f3a11645ad7aec426abec4c1f4a5eae1b4fa1ba464e1e54a0fc542c587a697a7285c742b9b1b5aa2ecebebcede780d679113645e71b",
    "signer": "0x53338fEc8A623db3e64Da05376c83Ea59Ea5Afd2",
    "userId": "587486248"
  }
}