{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x29c95dff5eeb2db9fd9be8dad8a46f1ba1649e03630bf853c04b52ca2b5ca5b9",
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    "signer": "0x3074f7E591e0C82fD63bd49E8e6F12C81546Aeae",
    "userId": "311529160"
  }
}