{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122419",
    "entityType": "Track",
    "nonce": "0x52da976145f44d60582baad908d527a4c53ac7e440df5a4a9cbe5af572b1a73b",
    "signature": "0x88a137ffd1d258ed0f646595b6ec7b5efad3afa6312d0d46649dd95ac0b9ee0d405ef800950849057a90b0ee341ad57fce9f12e6358a105eca1c5bdc30b7f4e01c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}