{
  "manageEntity": {
    "action": "Save",
    "entityId": "264400167",
    "entityType": "Track",
    "nonce": "0x90f5ab0c5db560e62b09c0c7754a7cf9f6ea7652a6c1634ccd31b82cf552e7dc",
    "signature": "0xbe5f204073ddd92920c8e8dba7426d58631e5e247027545ee4d997c2bd2f2c27599dfc11af1241bda4bdcf1151b4a64705192725e5bb5c3b645a5767160fc4831c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}