{
  "manageEntity": {
    "action": "Save",
    "entityId": "314220869",
    "entityType": "Track",
    "nonce": "0xcd197b355e97a8e62cdb611734029eb36df53c0a56774a44108501f07a537619",
    "signature": "0x57f423c1ef536387e9cb815f59a20eff7b298bb3c4a29a3efb3f818336af44df662057c1e00b87fa8b488661c0b01f0b2b6ff2d93d4f8ca86152dac7992a7ea31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}