{
  "manageEntity": {
    "action": "Save",
    "entityId": "1589483401",
    "entityType": "Track",
    "nonce": "0xda80059907df75afea564301fe4290da4d76cc904ce441f2117f8a8350d5042a",
    "signature": "0x672b3d3cbacc6eda4f6f2075167a93708729745a19916a141d63c0315c0c467a5fabc68b98cb6127b807171ce09ec039e1cb799f91ddd26b966e97809ef8c1ee1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}