{
  "manageEntity": {
    "action": "Save",
    "entityId": "1561303129",
    "entityType": "Track",
    "nonce": "0xdad32f1e2b873fd3ecc75973d0a9bf634003c427fd29de39002da9d4b3260b95",
    "signature": "0xddbf2fc88271afa0791e8f696a8abdd345415c1dab9575ad839376635d42029234f5a2677e863fe251fa6b00c863f6bd48a05a45d69b664b5f8f0d0f096e62181b",
    "signer": "0xaBca4973b8911Fb110a95E6e00e5BBFBCa671473",
    "userId": "832058678"
  }
}