{
  "manageEntity": {
    "action": "Create",
    "entityId": "589340622",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1437175556,\"body\":\"ayyy!\",\"comment_id\":589340622,\"track_timestamp_s\":53,\"mentions\":[]}}",
    "nonce": "0xe9d5a1209c27f1e74ab195b966915eed08965cb7def3e0f28e2befde4bc1e7b6",
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    "userId": "20"
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}