{
  "manageEntity": {
    "action": "Save",
    "entityId": "1827584415",
    "entityType": "Track",
    "nonce": "0xeff3e39f6c75277c733cf1cb6567b7e33a3c36120eb9e938da1875f7d32f3bf6",
    "signature": "0xe96cc0b233ae7ee2cb80561c50ec88a92080e0ce8ea1d65eb0bdf29cbe57dab70d1543d52a1e69b18658591dad75ce84eb74cb8fca89af7064639284ede510561c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}