{
  "manageEntity": {
    "action": "Save",
    "entityId": "761671341",
    "entityType": "Track",
    "nonce": "0x7df57372ae338d7233492750c293d496c75f2d887bb127a4973ca7b8a445920d",
    "signature": "0x1dd06a159518058003242e1640d9ec7ba33fc5894d2e9692e8b778fdb9bf44850fcf359e3e60234dd7254922cdef568aad87535b7b3d8066e950a72958fbb0ef1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}