{
  "manageEntity": {
    "action": "Create",
    "entityId": "657809839",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":181,\"entity_id\":571447922,\"body\":\"Huge!!!\",\"comment_id\":657809839,\"track_timestamp_s\":84,\"mentions\":[]}}",
    "nonce": "0x2e15529dcab8d66737e9f7dbb3a85bf0a0dee7ef8526ec067eb039fe51accc25",
    "signature": "0xfbe0c22e544b1dedb1cf9102d400c4131b0ad64ab56edb506e4d5c3a03ffa0992890e0fc3be45be4a71f20d7e5da99e29d43c6b45a5e9e068e11d37c7608b6381b",
    "signer": "0x4e636627B2C38e64C8D3aF5889767393B4fE6C1A",
    "userId": "181"
  }
}