{
  "manageEntity": {
    "action": "Create",
    "entityId": "1914369159",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":928123067,\"body\":\"impressive\",\"track_timestamp_s\":67}}",
    "nonce": "0x1ed4db86a2bb52ee7bc69c8922a6bdda401336c4dc5e5fa8c1a109eb05ab827d",
    "signature": "0x189cde54b755833e899309ef037e7355ec7c26d5fc3ebfba9a6292b4f237a7a506085b1d9e18f4f246127e84059c233be11a5b0b4009672ca3e2505a6c6ce4531c",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}