{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441830895",
    "entityType": "Track",
    "nonce": "0x7de76aa6ca45d166b2acd60d865801ba45e6a0eb09f7932dab0e2b1530659c89",
    "signature": "0x0fa95ce1f46197310944bce120dbea0de89ed102eeaa09ec8bc2e928858299b174ee477c4cb168ca531985abeed3644b989f7ea9414097916782ea5d0200a5f11b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}