{
  "manageEntity": {
    "action": "Create",
    "entityId": "2090692273",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Yoooooo!!!\",\"entity_id\":924577439,\"track_timestamp_s\":48}}",
    "nonce": "0x2313b4117050c447a63bfbfce289e0428506a61f4c7ac7b4115888434c3d2d45",
    "signature": "0x97a732a01cd008bea3eb3df0c92e1f1b23f87821d8635a9fe60f528e616de15b4d15f2d74d98f242256abf90300995b0a2b8576005721b02a8ad4871d0b281321c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}