{
  "manageEntity": {
    "action": "Create",
    "entityId": "59308349",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":968456662,\"body\":\"wooohoo!!\",\"track_timestamp_s\":66}}",
    "nonce": "0x02a69f7e766bab22074e6da499a2fe7701f3bb82a40acb49a2b5cd8e59761094",
    "signature": "0x4f512ce9c23a632cecb62173c24478542e32e42ec2726b926cb07a1d70d7bc16047494210a28b57372de511e0d789624d3d96076f96f16eac6b694910c61d2461c",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}