{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333052259",
    "entityType": "Track",
    "nonce": "0x187c560ced714a27b7fe5fdeeeaff10ddd730c8d50ecebd40b276deecdef069b",
    "signature": "0xa12823070e23b227fc5fd41f7eb29fbc39daaee2f02e29b677b1ae9ee4719e787374b6c55df8a538aed8415ab195890c1a742e7a6a935a29b2fdbddb3ff1fdeb1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}