{
  "manageEntity": {
    "action": "Save",
    "entityId": "116762315",
    "entityType": "Track",
    "nonce": "0xff3be5e66802aae15c53ba1d4300a0a0464d25f1f2f99c5069dfb7f019a30ac1",
    "signature": "0x21a5a1402b6180b2665a889e1c2692408314d04f48fc1c6fe55839b6dd9298194f602bc0044a762df448e2fd36f06b1d15b60bc961988a146eeaccce5418e7b71c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}