{
  "manageEntity": {
    "action": "Save",
    "entityId": "770067",
    "entityType": "Track",
    "nonce": "0x427604cc66a24b2e0f00d9ef4559270415ff23fff4dcd236744a5d58545d6489",
    "signature": "0xcbf3cb481f3d4de56090933899a53fd55dc1d5bbbd00d2a0ab05a8943eb32cc85ff0ddcba9a68be53f10183a8da64f5339a0ae6bf5fff494cb318169a31518391b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}