{
  "manageEntity": {
    "action": "Save",
    "entityId": "276680491",
    "entityType": "Track",
    "nonce": "0x9308d8e429dc9f698d30eb6d3a8fef46e39385f7a713f68c958a433256b0b532",
    "signature": "0xe628f67c63911919b5ffa64d2f622df840c35196169500ef341b797a9ca9d1a536741dcb37f7fc05308f6b7387fc2b3fa3bf3901f7e25c9cad8065be4d3e74fd1b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}