{
  "manageEntity": {
    "action": "Save",
    "entityId": "988516",
    "entityType": "Track",
    "nonce": "0x78dc53720415ee0f7df5268cbc47632f5ab6e8d284830a7a13ec03fa4e0c4cc2",
    "signature": "0x85a9a5827c0aa8a924f560ee02cf25c0916643c45414ccb2e92921e44990ce363cf5a4e21ede4d2968bcd76f0886471a763b70f944193d4c4e640a3137cf01361c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}