{
  "manageEntity": {
    "action": "Save",
    "entityId": "1141406438",
    "entityType": "Track",
    "nonce": "0x41db998f933e082edbd023b4fd97a322128780801dec3b46c7e64c565f5c8e14",
    "signature": "0x1617168c1cf68be91929c5871a7e4e3f178c0e17378c97060db01c735a20c0b93bc3b6533c6b3d0280d662fe4fddf0c66c3fd1f88b44a569dedf1effa44715a21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}