{
  "manageEntity": {
    "action": "Save",
    "entityId": "1208132134",
    "entityType": "Track",
    "nonce": "0x0f833b7c9ce2ba6fbe6a0e8489c5ff231f9887881cb244370e23972941695df6",
    "signature": "0x6381fbdb050cffe06b74688e88b213276518e9088bf3f9bbdeeed7d16d7d0c854d4e15ca28404182d5496148304938012678f3dba6cb857aa717391d15958a221b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}