{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7965727f402e8b9ad71f65645c81f0b6b2e19dfb404d239bdd080c38d972a348",
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    "signer": "0xC38A1c94E04EE9e85ebBC7acD3b5566D53fFC4ab",
    "userId": "507747752"
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}