{
  "manageEntity": {
    "action": "Save",
    "entityId": "133726620",
    "entityType": "Track",
    "nonce": "0x4c9288b70b535f9a11b56c00fe3504335d0d282cd98b11cfa5b483de315ec949",
    "signature": "0x02846debbd04ce1dd512c78772c848c0f46d8dbc799159eec7138394b5ac07676c718d54789d7e9f82139f7b4f9246dcaac485bcaca79faf11b717df1a4afb491c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}