{
  "manageEntity": {
    "action": "Create",
    "entityId": "1448810979",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Ooooh my brother!!! \",\"entity_id\":984891490}}",
    "nonce": "0x4848416733c2fdfceee0b79319e7fb7522645f88e9cd3f5bd08442147859805f",
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    "signer": "0x669C207e15A757a751fd8f623DFf054C6D3D0b05",
    "userId": "121458"
  }
}