{
  "manageEntity": {
    "action": "Create",
    "entityId": "600885865",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"genial\",\"entity_id\":864010746,\"track_timestamp_s\":0}}",
    "nonce": "0x58f41ad2563043d096e93b7141b6e5aa1adb9e03fe7f8dc82fe2107ce84a71f8",
    "signature": "0x5f9530a8b895c30f1eb1397f893902a9fa8fe56be7c74d3627d3cdbd12f471d8507c5f975651422661a3525efd51c0a0b42992cb1aa5f12ef24399076c2bf0901c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}