{
  "manageEntity": {
    "action": "Save",
    "entityId": "200183",
    "entityType": "Track",
    "nonce": "0x21ebd12e1f1a6f93372ee26b39eb21430e962d5f3d77fb9916f2825c5f84675a",
    "signature": "0x697574f76ede1edfb875a0f5520603b7940369f195753e66028a05f8ad6a7d2a241420af2d9a8f650230a2b8f2d3dff036d18cbf655b7bc2729cc580ad0cc9731b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}