{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628360249",
    "entityType": "Track",
    "nonce": "0x21d0fc81ab185cb8f188cd0bb7837a30504c4f8866f0927208936d01fc339039",
    "signature": "0xd5a91ee71388258406efb8a9edc0c8f28d44dfdb97a4fbbf6dfa127b83597ebe2283d2780ee94faa9786a39d4e5e04d29b8bd380b7574b314b614850746ded6a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}