{
  "manageEntity": {
    "action": "Create",
    "entityId": "2109344418",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Very cool!\",\"entity_id\":982617,\"track_timestamp_s\":83}}",
    "nonce": "0x4506ea8639317f36b36c24b635a21211e59319d5c674549e26ddded2f75130c6",
    "signature": "0x755457de7c739c3455f4c50d345634d0a93bd6ffadeba83edd9b96ff84f5f5331ea837070dbaf69f679da53fb28b822cd94c2d014b78c15261f8486e8f6eb3621b",
    "signer": "0x28b9f9197fB6fe7356F4228d71DCDD1C6aA3C8c3",
    "userId": "252398720"
  }
}