{
  "manageEntity": {
    "action": "Save",
    "entityId": "713564502",
    "entityType": "Track",
    "nonce": "0x5b31e91de82c0495413fa7eb4112df3356cb6d2c1f6809fb24fe2ffa699063bd",
    "signature": "0xf5a17f8c10dba377a7e43c3dea36c804ac4fd191988dcdfd8bf6c5c209daec5315ec7ae2652dc233d36d41e8c1c1e2e640496c926869e8761622bd972e58ec851c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}