{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998954690",
    "entityType": "Track",
    "nonce": "0x85a21813ece5b3fcec36008ad8bedfb0dc9b9ba56b5706081908d76dfb429436",
    "signature": "0x660d502ef97fe46be67a38dde8c4c36eaac6cab84ca1e819591e49cb16a9995018cafcd5f1157a95b827bf8e822ddf54f91d27ae54b01c314e85ef5f107002051b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}