{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278350963",
    "entityType": "Track",
    "nonce": "0x03061d3df851cd5680130d2389abf340584f6acb7815206fcbc0ef4ead20ce3d",
    "signature": "0xc37cb033d7f1b3904e1a850a58f1ae5ea2109b318f5e5fe9f7d036e75fc71336647aa67b4b9ac7e0c89efd84c9b17c6f8948f7e6a98305d7881e05a6beb7dd531b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}