{
  "manageEntity": {
    "action": "Save",
    "entityId": "1039223",
    "entityType": "Track",
    "nonce": "0xf3ebadcb64d8da04e893ac6f8d5841dfb1d8d9d306552fbc39457be855a66396",
    "signature": "0x094b831874ac224aa21408a903a91ce194f9aa6ed8c8def3a8fb6461ecac53893bd36840d401116e7fab948693ce71a15181627d4eed7d2608ea74451fc597881c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}