{
  "manageEntity": {
    "action": "Create",
    "entityId": "1660041197",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"This is awesome, it gave me a feeling of being enjoying the beach!\",\"entity_id\":600168370,\"track_timestamp_s\":379}}",
    "nonce": "0x8c2013807af7ddb0b3ef0dbfe1943e088b652513697f02846ad9c5c5fa0148a3",
    "signature": "0x75aa3d4ce8114d5eba96b80115cb97b3fd32fbe829bd0e1c35650807601f548252fd14d64a71015da2d7c8a4863e68a350dad027b3df02650af3688cd096ce711c",
    "signer": "0xD9A9ce288bCAE5105Ce96746a6244b77B7fca77c",
    "userId": "8662"
  }
}