{
  "manageEntity": {
    "action": "Create",
    "entityId": "1920041231",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Sick yo!\",\"entity_id\":1050673847,\"track_timestamp_s\":20}}",
    "nonce": "0x2f2d17ddc9d5a94a67a59c59b3739d0fb968225a74d4d32cf4518579adc7cb5a",
    "signature": "0xbd0fbea543943813df29afecef33d9b1d1fcf463420883015e5a94c6530148244882a5c62bb70e344cb808a401befe247c17efcd43f9dbfc753bb29c144cc86e1b",
    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
    "userId": "51"
  }
}