{
  "manageEntity": {
    "action": "Save",
    "entityId": "975240695",
    "entityType": "Track",
    "nonce": "0x35743b3a93c224a5ed1d87004caae99bde3e4b560afb241ba8715dde5b856513",
    "signature": "0x320d4c71f301debb2cd82657724711cef6f379dae6e69fa717928e1f6c9cc31650af87e8ae7a7fa3c9f324d201a75a3c7c198559623acc80ecaeedac1de0ccde1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}