{
  "manageEntity": {
    "action": "Save",
    "entityId": "170710",
    "entityType": "Track",
    "nonce": "0x0c2b395cf666f5da5bcc6e421611eee067ff6ec460c0038b89da45e6e776617c",
    "signature": "0xa8b63a143f5d92308b516531a70a5186fbc931eac66034b1b9b1bb7c2b55c75703d46f6dc3e4ae4ec5e6c9177eae888b2c2598b05272970a59bab21464c9767e1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}