{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611524217",
    "entityType": "Track",
    "nonce": "0x834ac92e05cf999b49cb56198a874e7bc6bba6ab83afb2108316a487c50368a6",
    "signature": "0xc79bfc67cdfa3fcb88dcea49c91cf1c0d9df76868021800a6a503fafb91900d804482c0499e1f021e86f737a5c6aa11ec555541d1c6f7e9990a0bae0693bc09a1c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}