{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe38b1f90bfb857996ddabd3bb47bf02da27c34530b9d400db0e89f59be086da6",
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    "signer": "0x4498BB57546B6a69b5503DB68f683593292BEec3",
    "userId": "659973395"
  }
}