{
  "manageEntity": {
    "action": "Create",
    "entityId": "1849246100",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":430079920,\"body\":\"quality\",\"track_timestamp_s\":2103}}",
    "nonce": "0xee12942cf94f03f069c107d9e26be3baeb5a5a3526b01ca706523eecf6cec53f",
    "signature": "0xa03be38f6255c07615f1d800c10fa305e0ef9b11b9783d5537422e9b8a449f084c86fb66f5736c634d89b97b4d79639f9eedfad381a3720c4c67d6e5aa65c1301c",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}