{
  "manageEntity": {
    "action": "Save",
    "entityId": "920265242",
    "entityType": "Track",
    "nonce": "0xc06b617901f59bd9fee735fa70ae2b313be725faab3aeb3e818f6d8b8ba4acd9",
    "signature": "0xf6afb5ecb07ee810d3c082e8b06bd661b3b59e275dcd16c3c89e795e908620d822620ec7073a01d87696a17a057455c2bab139eb6d0a910f7c358c71687cbfe51b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}