{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364391725",
    "entityType": "Track",
    "nonce": "0x180f1d05b72d514d24004c5ebe0a412639429a642f544a81c0ec20919e8b5779",
    "signature": "0x3095afb75ec4298582b13c9ae42cc1579e3c88a7b11004634d3b412066dbeeef2cb6ae9a71dc4b8d9d97a6951ee02b62d1cccb01325d444bb5cb20fe51d9fad61b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}