{
  "manageEntity": {
    "action": "Save",
    "entityId": "196105690",
    "entityType": "Track",
    "nonce": "0x8ee0d1755bbf03e22fb82a4e6bc9cce74bb74e4d85e25996d76be20137931b48",
    "signature": "0x537471aebffd5c8022fff2852cbbda9d6307a60c670372d5dda1bc9511de9a8d1b4d01adba97bc14992530a7e65965819249f35f1933a45d98a6824db041d9081c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}