{
  "manageEntity": {
    "action": "Save",
    "entityId": "410879302",
    "entityType": "Track",
    "nonce": "0x23589e3d68c730d5b9218e845d223854273bd5efc117e4091254b43c505f5f9c",
    "signature": "0xd40aa71a29c1eec1b291053de649463c6614163d64b5d061bd514e9fa5d6ebb27c01175d37755d27e9050cc503022a6f42379cd45146b25a09407f3dc0ce33a61c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}