{
  "manageEntity": {
    "action": "Save",
    "entityId": "282517617",
    "entityType": "Track",
    "nonce": "0x39f94571bbe119fb7451d38184e7432924f3ed76731a27b2da7ec78d1b748d2e",
    "signature": "0xfdc7b2c052fe7799b701bcf119461f43b3c37e92cc74b75e4ee7affc6265022112c45106216f02042d797b97bbd71aff06428f6ee7e5bbeab20e01343fb5209e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}