{
  "manageEntity": {
    "action": "Save",
    "entityId": "652848937",
    "entityType": "Track",
    "nonce": "0xc3a15e4aba66d3039908ff932886c6c3ebc4dcdb39626bcaefa90fe87037c3cc",
    "signature": "0x614d22b460a0c03cbe0a471f2dcb11ba2b35e00a4978ab5c0aefd1c85d434032594d0d17113b286d07feb84805be744095453db2f5a197db23b8fc120df224aa1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}