{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2f0bc5ea59655c648132a5587a01510070317e928c5794d02bddda9225a3e7e2",
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    "signer": "0x9fab6F70cf2d3Cf6CF9d410aFFbF2381359eD6A9",
    "userId": "92896385"
  }
}