{
  "manageEntity": {
    "action": "Create",
    "entityId": "1318627233",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"this is sooooo nice. highly refined\",\"entity_id\":2031207655,\"track_timestamp_s\":40}}",
    "nonce": "0x58c8c69aff25f8b6435652a5c8c01dbaed1a850972c64f44e5dfb85db0da1c1d",
    "signature": "0x4660753fd199111f3f2063c6f326caca7ec79b4f5b7622e04895d24d8fcb7c32514b78d78dcd4695be104ecd48258f27b2b24805b1eb2456d3808f5db2513d0e1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}