{
  "manageEntity": {
    "action": "Save",
    "entityId": "529930917",
    "entityType": "Track",
    "nonce": "0x4b87f0195cf59bfa3fcd8ff002bf5c9be4ae839c5e437d61115512d225cb18d7",
    "signature": "0xe4060a3e4b5818f01dfd1a150d0ec20a24dbc89d3044574611b2ed881e5fa5e91f18cd1dedc0d71fc02120f7d296f3082584d8bac7446419c1eca541a59457df1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}