{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364958120",
    "entityType": "Track",
    "nonce": "0xe01ca5db8a40e3227bc6be3fd3d491ef0bdb39bab50e94a478d680dd2e136f8d",
    "signature": "0x5edaaf28dcb9f74ce1e534fb2740a4df47d5719144004ded9802c87d4a01dc6c6e5a3f489ce6ad7cb3aa6a108e7e1ef8efbfd77588a70cbd65ea3000929483fa1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}