{
  "manageEntity": {
    "action": "Create",
    "entityId": "1170690123",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"yoooo!\",\"entity_id\":1728052873,\"track_timestamp_s\":72}}",
    "nonce": "0x32a3e24d0ba9057c0fa5de5bac07cf020eb4456d4f5c87b2ed304e8fbce745ed",
    "signature": "0x52b54d39931612b542f6e501c3154018d66f993c1b43ad79fcc06d796751588b34d750038088660cb60509a5cd252ee3150e25a5c2415cd4a12f62fb8600a97d1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}