{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814897225",
    "entityType": "Track",
    "nonce": "0x84c788954555fd7f23261fbb538370627555a02d9fbec9c65c6f05ad52aca689",
    "signature": "0x22b1428ed1316ac2cb7339199a34c6eae4a46ee57ca2a8fe98ea57a0b06d30c54bf05a3c3dcb664efb37e56c901ff0547e5b9fdebb61bff5dc09dc3306dba36a1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}