{
  "manageEntity": {
    "action": "Save",
    "entityId": "734391193",
    "entityType": "Track",
    "nonce": "0x791bf9f62b90187c00e62b9b107cb6a24b62d4ba72b744bef53399630941fa0a",
    "signature": "0xa2d3ec5d229f680339a051b188c141965952efe1f075f1de55696efa7b271b4a0daf84cab9a2618090da7f54432f1134971edc5e54433a15c45bd4d6a9c217261c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}