{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb786ca0cfb02e48f2e00ee6857f52612a3ed9fa3150a6766838486678c5d291b",
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    "signer": "0xc5489168852DF484AB87b99c4142bcf8f9686F96",
    "userId": "324348967"
  }
}