{
  "manageEntity": {
    "action": "Save",
    "entityId": "381587843",
    "entityType": "Track",
    "nonce": "0x414d7b47ed86fd01e121470dad50d131fbfde31b4c0af6a2b3ca8c8beebfe7cc",
    "signature": "0x4cf43a770238773f596fc01b1a866707e9cfef4027b46e54828a151055eb1b8d2a4a8c138c717b4021f1875543c7d475698723976669b65aa792ec9f25ef8b691c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}