{
  "manageEntity": {
    "action": "Create",
    "entityId": "144197255",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":906184213,\"track_id\":145627878,\"body\":\"nice\",\"track_timestamp_s\":70,\"mentions\":[],\"current_sort\":\"top\",\"new_id\":144197255,\"entity_id\":145627878,\"comment_id\":144197255}}",
    "nonce": "0x5aec67e6ae4bb38d5c23aa0975119e7a119263fa68aa2716cbf297f03e22f7d9",
    "signature": "0x9485e1d96d7dff7e7a8a4014f3552e0cdf13dc4c847daede71998da9d74f6ce83c69657a8eca92edf7b189464e367b837a84ab44abd8a396ce45857a81cd8a791b",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}