{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x72fba0055fe4a8b6cab71034e971c7eba0824355ab2f12694a926a08180cf94a",
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    "signer": "0xab2Ae5C2eAa3d8D19bA49bD0E1AFbd3Cfc25BEc1",
    "userId": "671611799"
  }
}