{
  "manageEntity": {
    "action": "Save",
    "entityId": "73306",
    "entityType": "Track",
    "nonce": "0x800d1a766596ca23349a83de3ffccd12570069f98c3cabe1697cdffe4950c459",
    "signature": "0x0809af8f884899790ae17d69ae1a44f1565b5731f5183373625ac5588c0000340b2d30a8c4ad24e64465d5399f2d3cac9d936215e97cdcbc461e31a5638d37521b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}