{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984064487",
    "entityType": "Track",
    "nonce": "0xc3aa3d210d9da2e0a5ce63df37d252b25773663b8edbea412c11d50fd0c53b23",
    "signature": "0x8ab512853d18ec139ec22503432b38370cd7b9896b32627689bfb0e29b603cb9320d90bd3e34ff43585662f867902fc18c752d919ab1e48840dc7995f15cbf6b1b",
    "signer": "0x1b2c37cDA8248bB03659377cbd309183c2292824",
    "userId": "306414"
  }
}