{
  "manageEntity": {
    "action": "Save",
    "entityId": "265430",
    "entityType": "Track",
    "nonce": "0xe86063fde8ae08c8a57d8c6d30c0bf5fb26bc35f82744aa3aabdf8e3c360c2ca",
    "signature": "0x02fc6ea335ed7caa4f8eabde8a63764245f78bd3000160887613fb3ae3779244537f85a5ac138a3ea704e853745bec123a633d6245850b9faf1c6572370cf6881c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}