{
  "manageEntity": {
    "action": "Save",
    "entityId": "571251971",
    "entityType": "Track",
    "nonce": "0x656d5d5ba04855fe342248025fb8542ac3916f69850909e0a7a85d02b549afd3",
    "signature": "0xf46bcea3a6853bb3c0283c197d33bba76ee2aae0c83f13b6d010cec24babe1ff6737708885a4a22f1c38b3aa34c4b68d5754967801440c48a255855fc0c996aa1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}