{
  "manageEntity": {
    "action": "Save",
    "entityId": "847838146",
    "entityType": "Track",
    "nonce": "0x276717015bb5e2b3af8555fbbbf89094929ec1f057c075106b1d8bcc187ad55f",
    "signature": "0xe71f14adce8e6b402449738172d9cd9336f2e3dfbcf0d400d931664399b9f1183a511c5211127db1ebec91ce4ef0c5f15d0c9d1bf48976fc66060f79fd7dc3da1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}