{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123397579",
    "entityType": "Track",
    "nonce": "0x9162ee834b2fdd578133185ddc42a3820657126189fe1e62b4324c98ffbab3f6",
    "signature": "0xbbba69d2f22faf4dfb31d3e84b83fd448fad30321f111bfd0e4062fe020b2311168534c15469e8d4ee73e5b59ff94613b91d0b25df25deec1f79980a78e1127a1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}