{
  "manageEntity": {
    "action": "Save",
    "entityId": "1024417680",
    "entityType": "Track",
    "nonce": "0xbc0e3b77f2714206df6c29b436d6f728ac83a75846832a0df5c260bfa84181f7",
    "signature": "0x6e121200eea3c3fed922b90e47df2dbc6b57f310a8cd7a1bd4e53d8339a47be41b8d6097e5d2ea03ef837bf63a2ad5fc60255b623ea58547693c0fbfa00834ef1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}