{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x66a108ec25f68d5f7b264cca7f3e88feeeafebc312320755ba48f85f93e5a692",
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    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
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}