{
  "manageEntity": {
    "action": "Create",
    "entityId": "145242934",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":607926157,\"body\":\"woohooooo!!\",\"track_timestamp_s\":83}}",
    "nonce": "0x8ef0852eb02dde3d8fee1f7373cde95389728b1a18466ffd250dac3a59d81320",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}