{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783393263",
    "entityType": "Track",
    "nonce": "0x198158170612835392a49045bd7ac68b9e9a290d79f52e1e9d5445160d458e1a",
    "signature": "0xcecd4a14d5e444f7c0f5f0df1e4ffa832290f6c138f788cbebde47eeec1b3efd490c74013c81926f159f679d60a4747593ba90c3fa2aa53eab9f6e7b2a7d1d0d1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}