{
  "manageEntity": {
    "action": "Create",
    "entityId": "1252577529",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":906184213,\"track_id\":357167534,\"body\":\"sounds huge\",\"track_timestamp_s\":67,\"mentions\":[],\"current_sort\":\"top\",\"new_id\":1252577529,\"entity_id\":357167534,\"comment_id\":1252577529}}",
    "nonce": "0x51d91ad6cf3a66e9c7ee48e21bfec67333e28a5acf19d8e1a9acf66c6166d6ce",
    "signature": "0xd4f3801591cf53262ab61eb5db6d953607f33e7cd0a657eee575fcc6b45e4d59724e6545b7dd5f17b2751aede8dec39974085476a1e79632341ce1b9cdb117d11b",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}