{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x418c1b4d0ff45c213b37190e943b63ea5b1b3767f2fe15b833b71489ab660c34",
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    "signer": "0xEc934c3909F00A6d3a228eafb6cfAC236368E068",
    "userId": "839708037"
  }
}