{
  "manageEntity": {
    "action": "Save",
    "entityId": "911117903",
    "entityType": "Track",
    "nonce": "0x01479a7d63fb2e1e0bad80f71114807345e86d0aa4a2a9cb90f4a56b85403adb",
    "signature": "0xeda64a989741778cfbf115171618e6c4ec8e7feb71352a682f44a1590828bb1f02d95391c227fc6cf36508c0baebdb675c73b803e9138250a952590f804efebf1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}