{
  "manageEntity": {
    "action": "Update",
    "entityId": "1097974951",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1786869771,\"track_id\":2073066082},{\"timestamp\":1786869771,\"track_id\":791077015}]}}",
    "nonce": "1786869771109067582",
    "signature": "0xc3e9530a25ffb278f3f03467ff01b887cac1dc948a2a1912dd4a1505a86896470e398a5bc5766a9ec7dcd005102b5e6581be14d6e5f5f992f7688156be3e82e11b",
    "signer": "0x922cb2AE695da9f7Dd0e556954c23eeeb8bfFe0E",
    "userId": "550521608"
  }
}