{
  "manageEntity": {
    "action": "Create",
    "entityId": "1305647025",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1481167316,\"body\":\"sick!\",\"track_timestamp_s\":72}}",
    "nonce": "0x9089e781f5c2481edf672d2ac07d8ffc90c21afc009c3d3c4d64d0f1dc6a4e45",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}