{
  "manageEntity": {
    "action": "Save",
    "entityId": "883716458",
    "entityType": "Track",
    "nonce": "0xe3f5eb9ba2caf8efe943d16381a982b00c2de3e37603505ef35ef6539fc71f27",
    "signature": "0x42436868c03e5c2135bd4f7be74b4c9296b36f0fd0b976be65181890d554d19374d3c55acfaec7c270232646162f4a83fff3599fc80cbaeb1122913137a2d5781c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}