{
  "manageEntity": {
    "action": "Create",
    "entityId": "807453912",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1311108960,\"body\":\"\u003c3 \u003c3\",\"track_timestamp_s\":26}}",
    "nonce": "0x7ea6b2f62e01f52ac8b4f2edce836decda1dd311ce16dd152ae4ceb91620b2bd",
    "signature": "0x120c4ac82ae080d205dc54baac3f90819f8ce94b19ed773681e16400d79b059f3cdf530fe0e5416284fb3773ee3dbceee9a22a62d233b13418e5ea3864dbbfce1b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}