{
  "manageEntity": {
    "action": "Create",
    "entityId": "657139500",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1662435937,\"body\":\"awesome!\",\"track_timestamp_s\":60}}",
    "nonce": "0x352f6e24d9deb04a22d365c759c3d019626609a6dde1c68109cf63dcf781c837",
    "signature": "0xb4e3dba6b69af2852834793cf38c6dbe8c6693cbe3dcd6f3f0514fc702e2368710bb9aefae260f5ffcfae0b98e1a46e147d9b1835b809437c1b6853bfed79f771b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}