{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f10efc5cb90b8fe2698de43d09656bcd56fe5cde5a6841a3eea04000c2cb038",
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    "signer": "0x0AF6A4286FfF89666F385186440d5d3B9A61A3d4",
    "userId": "877759925"
  }
}