{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb7c2ef4ef31b53bb55a26041c83f27173f37aab214adaadb0c8bd5630c855fcf",
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    "signer": "0x65869a098BF9FBc47eb815621Ae2B52e3bAD8807",
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}