{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915616725",
    "entityType": "Track",
    "nonce": "0x6d0cb0a947b8c7b0717760fbfa41608f1a2b69b24107af8134d3fbbeadce9107",
    "signature": "0x9f695cdb098883dc756d9392d32e1fface9df902dc5843dae1207973653b599b37a84fe94d1be525bae60fe21edbf1f72248e6997888e05d48ce4de6cc9393391c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}