{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235764825",
    "entityType": "Track",
    "nonce": "0x6f1861c4db1505bd72a5d70584d27b98c17790593deaf7e7da066ffb9eac834e",
    "signature": "0x7fce0cc10ac863ac18cc0c9ee98e23260012d7813fd89e552a647668f7ac85a01e2d051f8cbebd139a8aef22445bd182661b1e14c58a378d2bca290647a20e0d1c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}