{
  "manageEntity": {
    "action": "Save",
    "entityId": "60609",
    "entityType": "Track",
    "nonce": "0x21b4e83da287dd2df2c03890f9fe02980ef16a78625a9cbe7d33c34cd42a9eaf",
    "signature": "0xb0e971373fe4e3fe5d5fba293ccf52889aa1484f94e5e62669273301dabcd6233a8229b15d44b375b3299f2661d278f1deda25e6c926ffe623272f86a2cda5ce1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}