{
  "manageEntity": {
    "action": "Create",
    "entityId": "1196682113",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":399383583,\"body\":\"beautiful\",\"track_timestamp_s\":79}}",
    "nonce": "0xc15bc2397ecccb13ac251f0f48d0d08e39179d33048f247fb27b099a6f2d3145",
    "signature": "0x255314989ce4d26ddd2a6b6ac5601a5bb27522e70fbb73f8db8eb85a05cfffad4e24a3c7149253f305ebc84a9762da7e33d39b1b012b5811064c1f493bab68c01b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}