{
  "manageEntity": {
    "action": "Save",
    "entityId": "2130706832",
    "entityType": "Track",
    "nonce": "0x9d4d01d014deb976b055eac67ca659aff96c122906c0b66da31f3bcaa9878458",
    "signature": "0xcff00c5083afd7a0746b7d2091c758e67d79e272ee1fa0ad415b6fd8aade296866436c00c423a42d566aab908180f5bb4a01ab2126da89845913a5f301538afa1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}