{
  "manageEntity": {
    "action": "Save",
    "entityId": "130396725",
    "entityType": "Track",
    "nonce": "0xef6b0d76384ee51d55fb555df0404052edff18b980435d4a2578cd8884c38fff",
    "signature": "0x5a1ecba1a80621ec184dfc2e1011c094d9ade62466a1dbc3a191282ac5d4818702f463c1b0b90c9d81ec80156805a6046d1b99f89e67518911026cbe50144bb81b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}