{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532974711",
    "entityType": "Track",
    "nonce": "0xe84b3b9151fc0807681226bccd3a9f28de919318322ffab6c0dfcbe6549eb845",
    "signature": "0xb35e0bb32d677c1813105d59b46287d3adfb2e650263a4d70924b2d0a54a7eed2a33e622a7bd142672f9ed2159cfac5b394ae88d8cc57f4dd43e8ef5accb910c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}