{
  "manageEntity": {
    "action": "Create",
    "entityId": "501855401",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"very cool city vibes\",\"entity_id\":1381160241,\"track_timestamp_s\":48}}",
    "nonce": "0x2f8ca46e76924dab01d9f5e191c6095e3e17863366ceb2bbb4a49ff6bf7da99e",
    "signature": "0x3c0e84543712a67b6778de69e1375a7b204762a1bbb55b65176adb538ca746600a062c6464396d5defa3187121cce454e4eda665727f9d13e8201c81df3cfaae1c",
    "signer": "0xe87C31b64532cB37AF1e437F9764994164E9d583",
    "userId": "701183610"
  }
}