{
  "manageEntity": {
    "action": "Create",
    "entityId": "148429063",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"love it! Groovy and catchy!\",\"entity_id\":1719998964,\"track_timestamp_s\":142}}",
    "nonce": "0x47adf60934e6e2f4ca6f1c4d20f2265c280b556766847c5fabe56dddf035e097",
    "signature": "0x80d56e5dde3cacf1ce6de40394822c48e13c46c3187b096217ae60618a11bbb1697d39c4084c8786a21ab6b4d87b4c47082f96d952104ce23a82ef675c4044191c",
    "signer": "0x9db5A0F6677d5b3dd26Fa3BE1110e1344e412848",
    "userId": "271106822"
  }
}