{
  "manageEntity": {
    "action": "Save",
    "entityId": "830900014",
    "entityType": "Track",
    "nonce": "0x5b367784b4cbb0a61d627d830cb505d50c37500de1373c8636fceccf16842f53",
    "signature": "0x57d2bf9b1d640b5abe1841148f379d942fe17aebdd8650e88c2cd1740d7baa576e6eb161ec3c0d3b318862e1352d89be9e91243ad015c9f3d258ad95e43808b11c",
    "signer": "0x1Bd1aB857bd91ca351Cc91d8dCe3644C0B43B6CF",
    "userId": "875266680"
  }
}