{
  "manageEntity": {
    "action": "Create",
    "entityId": "1296216275",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":430079920,\"body\":\"quality\",\"track_timestamp_s\":2103}}",
    "nonce": "0xa3674ec2f97eb6ed943038affeec4435c762839b2dbd1862076f26e509b2795c",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
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  }
}