{
  "manageEntity": {
    "action": "Save",
    "entityId": "74658",
    "entityType": "Track",
    "nonce": "0xb78ea6164dd9dc7488e58da5e1362d3cbd9c2d81af12984052a65aab2d82125d",
    "signature": "0x5bce505d37bbb9f1b7df0ecaa9063ecac51097a7096b530d634d9fc1da2d01903ada37919d5cff5eb2a76156ec0e49f65651d88a81c47f54da3d5a8d543e169e1b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}