{
  "manageEntity": {
    "action": "Create",
    "entityId": "1999778963",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":121458,\"entity_id\":1005378765,\"body\":\"Beautiful \",\"comment_id\":1999778963,\"track_timestamp_s\":33,\"mentions\":[]}}",
    "nonce": "0x0efb59e7def96343909a24bc8fd5b5ed61a612c5c34a8a92df93350acb5ae1f9",
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    "signer": "0x669C207e15A757a751fd8f623DFf054C6D3D0b05",
    "userId": "121458"
  }
}