{
  "manageEntity": {
    "action": "Create",
    "entityId": "1575756235",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1279195426,\"body\":\"sick!\",\"track_timestamp_s\":65}}",
    "nonce": "0x77c65497b913db8c6f31e0652d60217aa28976187bb688058457a1c787c11994",
    "signature": "0xac5dadaeac65103bf91a63a47fadf0c9198fd5629badd1cedeb7aa34b9cfa61703bf7cc016a24a9d30557a916c307a7aa9777586ef4a44bb3c4c4bffbba0052f1b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}