{
  "manageEntity": {
    "action": "Save",
    "entityId": "265266501",
    "entityType": "Track",
    "nonce": "0xfff22fcbf8563e84ffacbefacc67f2eb3a10d2d3679ae75bc6def81bf36b81d9",
    "signature": "0xd95b8d6c9fa4374ed8a3bf1a0c61cd0f20c95c8c21a76279f7dd382514755ff82abdb36844bd965a801b6304677a9d78c022b827b5c6e5773dde4d0a12cd7d8e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}