{
  "manageEntity": {
    "action": "Save",
    "entityId": "953063",
    "entityType": "Track",
    "nonce": "0x5e1865670708de54a210f8f17c69ad1402cd91ed9bd0a2a69d6382db3515a27d",
    "signature": "0x635616760deca2dcd5a39e57ec59e7f09d8ef853268b50f0470235fb5b0587797a1c2cf638300b53a8431dc837507763bab4c20d87d9f74d92b96abccab596001b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}