{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259847638",
    "entityType": "Track",
    "nonce": "0x9e6b225768f28e599b2cf98efbdf328145e845558a3a00d1ed582a61a3bba3cf",
    "signature": "0xe519f1a5da5c8633e6e862f0cc78b149273549d30e2cb0ab44c7566a0e6df8e104e37e7c6d6f26b79562496d5598b27ab6d1054e200e869d01cc5116f3d503801b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}