{
  "manageEntity": {
    "action": "Save",
    "entityId": "234696373",
    "entityType": "Track",
    "nonce": "0x32bb32f65cec38fb78eb42a6f8b8a78bf57ac23f50f079aabbddaec0f6750ae1",
    "signature": "0x41c88f3fcde78d248c4c59ebaf24108e47c580aad8177da87e093db577203a622e94424ab69d0f276a1baa4d3c8f73eef3b0d3f3726a631b647f953f3495ad481b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}