{
  "manageEntity": {
    "action": "Create",
    "entityId": "418264713",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"groove on\",\"entity_id\":1744447375,\"track_timestamp_s\":80}}",
    "nonce": "0x971dd2d462cca785b9fb85d8059d46820a54ab6756219400687cfa01b151c448",
    "signature": "0x637ef7cc9a6531c797bb60e0ffc7403050a5507e7d6b13a29604c8aaa60aa03d4a61251ff8ffbb5417371d1f605e369cb4c99f0f2e07a0f088838a28f3925f201c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}